Population Growth

Correct answer: A. आधार आबादी, वृद्धि दर, आयु संरचना, प्रवास और सेवा क्षमता को साथ देखकर योजना बनाना

The direct answer is A. Mature administration uses several population indicators together instead of depending on one isolated number. First, the base population shows how many people already need services. Next, the growth rate indicates how quickly that number may change. Age structure shows whether the main demand will be for schools, jobs, hospitals, childcare or elderly care. Migration is also important because people entering or leaving can change local demand quickly, even when the birth rate changes little. Finally, service capacity tells planners whether existing schools, clinics, water systems and transport can meet the expected need. Option A is correct because it combines these connected facts and supports realistic budgeting and infrastructure planning. Option B is wrong because total births do not show deaths, migration, existing population or age composition. Option C is wrong because migration can strongly affect actual population change. Option D is wrong because different places have different age structures, densities and service needs. Memory cue: good planning asks “How many, how fast, what ages, where moving, and what services exist?”

Correct answer: A. यदि क्षेत्रफल समान रहे, तो वृद्धि घनत्व बढ़ा सकती है

The direct answer is A. Population density means the number of people living in a unit of area, often expressed as people per square kilometre. The basic relation is density = population ÷ area. If the area remains constant and the population increases, the numerator becomes larger while the denominator stays unchanged, so density increases. This is why the statement is conditional: population growth can raise density when area is unchanged. Option A is correct. Option B is wrong because growth does not always reduce density; under a fixed area it normally raises density. Option C is wrong because growth describes change in population over time, whereas density describes population in relation to area. Option D is wrong because density is not migration alone; it includes all people living in the area, whether they were born there or moved there. If area also changes, the result may be different, so always check both population and area. Memory cue: density is a “people per area” measure, while growth is a “change over time” measure.

Correct answer: A. बेहतर स्वास्थ्य मृत्यु दर घटा सकता है, जिससे कुछ समय तक वृद्धि तेज हो सकती है

The direct answer is A. Population change depends on births, deaths and migration. When health conditions improve, deaths—especially preventable deaths—may decline. If births remain relatively high for some time, fewer deaths mean that the population can grow more rapidly. This is a possible short- or medium-term effect, not an unavoidable result in every place. Later, better health, education and changing social conditions may also be associated with lower fertility, but the question asks for the simple relation between health and growth. Option A is correct because it accurately connects improved health with a lower death rate and possible temporary acceleration of growth. Option B is wrong because better health does not automatically make births zero. Option C is wrong because health conditions strongly influence survival and mortality. Option D is wrong because reducing deaths does not immediately reduce population; it can initially add to population growth. Memory cue: in the population balance, births and in-migration add people, while deaths and out-migration remove people. Health improvement often first affects the death side of this balance.

Correct answer: A. जब अधिक जन्मों से बाल आबादी तेजी से बढ़ रही हो

The direct answer is A. Education planning must consider the number and age of children who will need schooling. If many births cause the child population to rise quickly, more children will reach school-going ages in the future. Planners may therefore need additional classrooms, teachers, buildings, learning materials, transport and budgets. The exact demand depends on age distribution and timing, but a rapidly growing child population clearly creates strong future pressure on education services. Option A is correct because it connects high population growth with the relevant age group and a real planning requirement. Option B is wrong because no children would mean no child-school demand in the stated situation. Option C is wrong because an entirely elderly population would create greater demand for health and care services rather than ordinary school places. Option D is wrong because a growing child population does not make school need zero. The common confusion is to look only at the total population. For education, age structure matters especially: total growth matters most when it increases the number of school-age children. Memory cue: population growth plus more children means plan more schools and teachers.

Correct answer: B. बाह्य प्रवास प्राकृतिक वृद्धि से अधिक है

The direct answer is B. Natural increase is calculated from births minus deaths. It can be positive when births exceed deaths. However, actual population change also includes migration. A useful relation is actual change = natural increase + in-migration − out-migration. If out-migration is larger than the positive natural increase, more people leave than are added by births after deaths are considered, so the total population decreases. Option B is correct because it provides exactly this balancing explanation. Option A is wrong because in-migration adds people and would generally strengthen, not offset, a positive natural increase. Option C is wrong because a positive natural increase requires births to exceed deaths; it does not mean the birth rate is zero. Option D is wrong because deaths are part of the calculation of natural increase and therefore do have an effect. The important distinction is between natural increase and actual population change. Memory cue: births minus deaths describe natural increase; add arrivals and subtract departures to find the broader population change.

Correct answer: A. वृद्धि दर अभी भी धनात्मक हो सकती है

The direct answer is A. A falling growth rate means that the speed of increase is becoming smaller; it does not necessarily mean that the rate has become negative. For example, a growth rate may fall from 3% to 2% and then to 1%, while the population still rises each year. The total continues to increase as long as the growth rate remains positive. Option A is correct because it separates the direction of the rate from the direction of the population total. Option B is wrong because a declining rate is not the same as a declining population. Population decline requires a zero or negative net change, depending on the situation. Option C is unsupported: the information given does not tell us whether migration has stopped. Option D is wrong because births and deaths are important components of population change and are related to the growth rate. The common confusion is between “the rate is decreasing” and “the population is decreasing.” Memory cue: a positive rate that is getting smaller still adds population; only a negative rate indicates decline, all else being interpreted consistently.

Correct answer: A. Because the same percentage can add different actual numbers

Direct answer: Option A. A growth rate is calculated in relation to the population at the beginning of the period, called the base population. The formula is percentage growth = (increase ÷ base population) × 100. Therefore, the same percentage can represent very different numbers of people. For example, 10% of 1,000 is 100, but 10% of 100,000 is 10,000. Option A is correct because the base determines the actual number added. Option B is wrong because percentage growth is directly related to the starting population. Option C is wrong because the base is the initial population, not zero. Option D is wrong because growth rate concerns population change, not land area. Do not confuse relative growth, expressed as a percentage, with absolute growth, expressed as the number of people. Memory cue: percentage needs a base.

Correct answer: A. First area's

Direct answer: Option A. First calculate the increase, then divide it by the starting population. In the first area, the increase is 5,000 − 4,000 = 1,000. Its growth rate is 1,000 ÷ 4,000 × 100 = 25%. In the second area, the increase is 44,000 − 40,000 = 4,000, but its rate is 4,000 ÷ 40,000 × 100 = 10%. Thus the second area gained more people in absolute numbers, but the first area grew faster relative to its original size. Option A is correct. B confuses absolute increase with percentage growth. C is wrong because 25% and 10% are not equal. D is wrong because both populations increased, not decreased. Memory cue: growth rate means change divided by the starting value.

Correct answer: A. Because migration can bring different age and skill groups

Direct answer: Option A. Zero natural increase means births and deaths are equal, so there is no net change from those two processes. It does not mean that the population disappears or that its composition cannot change. Migration can bring people with different ages, occupations, education levels, or skills, and it can also take some groups away. For example, if many young adults move into a city, the share of working-age people may rise even when births equal deaths. Option A is correct because migration changes the composition of the population. Option B is wrong because zero natural increase does not mean zero population. Option C is wrong because births and deaths still determine natural increase. Option D is meaningless because area is a measure of land, not age structure. Memory cue: a population can keep the same size but have different members.

Correct answer: B. Rapid growth and weak resource management

Direct answer: Option B. Rapid population growth increases demand for water, food, land, energy, housing, transport, and waste disposal. If resource management is weak, authorities and communities may be unable to provide these services safely, so pollution, waste accumulation, resource depletion, and pressure on ecosystems can become more serious. Option A is less serious because strong waste management can reduce pollution and handle increasing demand more effectively. Option B is correct because rapid growth combines high pressure with limited management capacity. Option C is less likely to create the greatest impact because slow growth and sufficient resources reduce pressure. Option D is also less likely because stable population and better planning improve management. Memory cue: environmental risk is greatest when population pressure is high and management capacity is weak.

Correct answer: A. Because education, health awareness and supportive social behaviour are also needed

The direct answer is A. Birth rate is influenced by more than income or economic production. Economic development may improve living standards, but families also need access to education, health services, information about contraception, and safe family-planning facilities. When people understand the health and economic benefits of a smaller family and can freely use suitable services, fertility often declines. Option A is correct because it recognises these connected social, health and behavioural factors. Option B is wrong because family customs, education and social expectations strongly influence decisions about childbearing. Option C is wrong because development does not always raise birth rates; in many settings, better education and living conditions are associated with lower fertility. Option D is wrong because effective family-welfare services can help people plan the number and spacing of children. Memory cue: birth rate depends on income plus awareness, health access and social choice.

Correct answer: C. Healthcare and social security

The direct answer is C. Planning must respond to the age composition of the population, not only to its total growth rate. If the proportion or number of elderly people rises, the area may need accessible medical care, regular health services, medicines, support for people with limited mobility, pensions and other forms of social security. Option C is correct because these services address the likely needs of an ageing population. Option A is wrong: a low growth rate does not mean that all children’s schools should close, and children may still need education. Option B is wrong because mining is an economic activity, not a general response to population ageing. Option D is wrong because migration may still occur and should be considered in planning. Memory cue: ageing population means greater priority for care, security and health services.

Correct answer: A. The time period is the same and the territorial boundary is clear

The direct answer is A. A fair growth-rate comparison requires comparable units. First, the two observations should cover the same length of time, because a ten-year increase cannot be directly compared with a two-year increase without adjustment. Second, the territorial boundaries should be clear and comparable, because adding or removing villages, towns or districts changes the population base. Option A is correct because it provides both essential controls. Option B is wrong because unequal periods can produce misleading rates. Option C is wrong because a boundary change can alter the population total without representing the same kind of demographic change. Option D is wrong because names alone do not identify the population, area or period being compared. Memory cue: before comparing growth, check time, territory and base population.

Correct answer: A. The base area may be different because of the boundary change

The direct answer is A. Population growth should normally be compared for the same geographical area in both periods. If a village, town or part of a district is added or removed, the population total may change because the boundary changed, not because births, deaths or migration produced the same amount of growth. To make a fair comparison, identify the old and new boundaries and use data adjusted to one common area whenever possible. Option A is correct because it warns that the base area may not be the same. Option B is wrong because boundaries can substantially affect totals and calculated rates. Option C is wrong because data do not automatically become zero. Option D is wrong because weather is not the only determinant of population growth; births, deaths and migration also matter. Memory cue: changed boundary means changed comparison base.

Correct answer: A. Pressure of unemployment and out-migration

The direct answer is A. Rapid population growth can increase the number of people entering the working-age population. If employment opportunities do not expand at a similar pace, competition for available work may rise and some people may remain unemployed or underemployed. Households may then face pressure on income, housing and basic services, and some workers may move to other areas in search of work. Option A is correct because unemployment and out-migration are plausible effects of a growing labour supply with limited jobs. Option B is wrong because population growth does not automatically create employment. Option C is wrong because no demographic condition makes the death rate automatically zero. Option D is wrong because natural and economic resources remain limited. Memory cue: more workers plus too few jobs can mean unemployment and migration pressure.

Correct answer: B. Schools, nutrition, vaccination and child healthcare

The direct answer is B. A large share of children means that many people need age-specific services at the same time. Planning will therefore need enough schools and teachers, child nutrition programmes, vaccination, primary healthcare, safe water and other support for healthy growth. Rapid growth can make this demand increase quickly, so planners must consider both the number of children and the available facilities. Option B is correct because all four services are directly related to children’s development and survival. Option A is wrong because pensions serve older people and cannot be the only priority when children form the largest share. Option C is wrong because a port is a specific infrastructure project and does not answer the main age-related service need. Option D is wrong because mineral exports do not provide education or child health services. Memory cue: a young age structure requires child-centred planning.

Correct answer: B. The population is increasing, but resources are not growing as fast

The direct answer is B. Per-capita resources mean the total amount of a resource divided among the population. Even when the total amount of water, land, food or other resources rises slightly, the amount available for each person can fall if the population grows faster. For example, if a resource increases by 2 percent but the population increases by 5 percent, average availability per person declines. Option B is correct because it compares the rates of population growth and resource growth. Option A would generally increase, not decrease, per-capita availability. Option C contradicts the statement that growth is positive. Option D is wrong because resources are not unlimited. Memory cue: per capita = total resource divided by people; the faster-growing side controls the pressure.

Correct answer: A. Births equal deaths and out-migration is high

Answer: A. Natural increase means births minus deaths. If births and deaths are equal, natural increase is zero. Actual population growth also includes migration: actual growth = natural increase + in-migration − out-migration. In option A, natural increase is 0, but many people leave the area, so out-migration is greater than in-migration and actual growth becomes negative. A is therefore correct. B is wrong because high in-migration adds people and makes actual growth positive. C is wrong because births exceed deaths, so natural increase is already positive; migration would add still more people. D is wrong because deaths are fewer than births, so natural increase is positive even without migration. Memory cue: births minus deaths describe natural change; people entering or leaving describe actual change.

Correct answer: A. Because growth can differ by region and district

Answer: A. A national average is a combined figure calculated for the whole country. It is useful for seeing the broad national pattern, but it can hide differences between states, regions, districts, cities and villages. One area may have rapid growth while another has slow growth or even decline; when these figures are combined, the national average may look moderate. A is correct because regional and district-level information gives a clearer picture for planning schools, hospitals, jobs, housing and other services. B is wrong because national averages are useful as a general summary. C is wrong because local populations certainly exist and are important units of study. D is wrong because population growth is influenced by local birth rates, death rates, migration and social conditions, all of which vary from place to place. Memory cue: an average tells the middle picture, not every local picture.

Correct answer: A. When rural-to-urban migration is high

Answer: A. Rural-to-urban migration means people move from villages to towns or cities, usually in search of work, education, services or other opportunities. The people who move are added to the city’s population and removed from the village’s population. Thus, even if the total population of the wider region changes only a little, the city may experience greater population pressure while the village may show slower growth or a decline. A is correct because it describes this spatial redistribution. B is wrong because a return to villages would increase village population and reduce city pressure. C is not the best answer because a lack of jobs would normally discourage migration to the city; it does not itself create the stated pattern. D is wrong because stopping migration would prevent this redistribution. Memory cue: migration changes where people live, not just how many people exist.

Correct answer: A. Large-scale availability of basic services

Answer: A. Growth rate tells us how quickly the population is changing, while total population tells us how many people already need services. A low rate does not mean that the population is small. If millions of people already live in an area, they still require schools, hospitals, drinking water, sanitation, transport, housing and employment. Therefore, large-scale provision of basic services must remain a planning priority. A is correct because planning must respond to the actual number of people as well as the rate of change. B is wrong because ignoring data can lead to poor decisions. C is wrong because existing people continue to need services. D is wrong because a low growth rate never makes service needs zero. Memory cue: rate shows speed; total population shows the size of the present responsibility.

Correct answer: B. When growth is slow and health infrastructure is strong

Answer: B. Pressure on health services depends not only on the number of people but also on how quickly the population grows and how much healthcare capacity exists. Slow population growth gives hospitals, clinics and health workers more time to expand. Strong infrastructure, trained staff, medicines, disease-control systems, clean water and sanitation help meet people’s needs more effectively. B is correct because both conditions reduce pressure relative to the other choices. A is wrong because rapid growth combined with few hospitals creates a heavy burden. C is wrong because weak disease control can increase illness and demand for treatment. D is wrong because unsafe water can spread disease and increase pressure on health services. This answer does not mean slow growth removes all health needs; it means that adequate capacity can manage demand better. Memory cue: population pressure is lower when growth is manageable and service capacity is strong.

Correct answer: A. Pressure on basic services will increase

The direct answer is A: pressure on basic services will increase. Natural increase means that births are greater than deaths, so the number of people rises even without migration. As the population grows, more people need drinking water, sanitation, schools, hospitals, houses, transport and waste disposal. If urban facilities are weak, they cannot expand quickly enough to meet this rising demand. As a result, existing services may become overcrowded or insufficient, and shortages may appear. Option A is correct because it links population growth with limited service capacity. Option B is wrong because resources and facilities are not infinite. Option C is wrong because high natural increase normally adds to population rather than making it decline. Option D is wrong because weak facilities do not make migration mathematically impossible; people may still move in, although living conditions may become difficult. Memory cue: more people plus weak facilities equals greater service pressure.

Correct answer: A. Because change is measured in comparison with that initial number

The direct answer is A: change is measured in comparison with the initial population. Population growth may be expressed as an absolute increase or as a percentage. For percentage growth, the usual idea is: percentage growth = (new population − old population) ÷ old population × 100. The old population is the starting point, so it provides the reference for judging how large the increase is. For example, an increase of 10,000 people means something different in a population of 20,000 than in a population of 1,000,000. Option A is correct because the base makes the comparison meaningful. Option B is false: new population figures are not automatically wrong. Option C is false because population and area are different measurements. Option D is false because a percentage comparison requires a base. Memory cue: growth compares the change with where the population started; therefore, keep the old population in the denominator.

Correct answer: A. Where water sources are limited and demand is rising quickly

The direct answer is A: the greatest effect is likely where water sources are limited and demand is rising quickly. Rapid population growth adds more users who need water for drinking, cooking, sanitation, farming and other activities. If the available supply is already small, the same rivers, wells, reservoirs or groundwater sources must serve many more people. This can increase competition, shortages and pressure on water quality. Option A contains both important conditions: limited supply and rapidly increasing demand. Option B is less likely to face a serious crisis because sufficient supply and low demand reduce pressure. Option C is generally less likely because a declining population tends to reduce demand, other conditions being equal. Option D is not the best answer because strong management can conserve and distribute water more effectively, although it cannot create an unlimited supply. Memory cue: water stress becomes strongest when demand rises while supply stays limited.