Population Growth

Correct answer: A. क्योंकि युवा आबादी भविष्य में जन्मों की संख्या को प्रभावित करती है

The direct answer is A. A large young population can create population momentum. Even when the average number of births per woman is low, a large number of young people may soon enter the reproductive-age group. If they have children, the total number of births can remain substantial because the number of potential parents is large. This does not mean that growth must continue forever or that the birth rate is high; it means age structure affects the timing and size of future growth. Option A is correct because it connects the large young cohort with future births. Option B is wrong because a low birth rate does not instantly reduce the population to zero. Option C is wrong because age structure is central to understanding population momentum. Option D is wrong because the information given does not prove that mortality will always rise. The key distinction is between a rate and the number of people to whom that rate applies. Memory cue: a low rate applied to a large young group can still produce many births.

Correct answer: A. Due to population momentum

Answer: A. Population momentum is the continued growth that can occur after fertility or birth rates begin to fall. A large young population contains many people who are entering or are already in the childbearing ages. Even if each family has fewer children than before, the large number of potential parents can produce a considerable number of births for some time. The population may therefore continue to grow before the smaller family size is fully reflected in the total population. A is correct. B is wrong because death rates do not become zero and that is not the explanation. C is wrong because population momentum is mainly connected with age structure and fertility, not the impossibility of migration. D is wrong because stopping a census cannot stop demographic change. Memory cue: fewer children per family may still mean many births when there are many young adults.

Correct answer: B. Through in-migration growth, land availability and the speed of housing construction

Answer: B. A housing crisis occurs when the demand for homes is greater than the supply of suitable and affordable housing. A rapidly growing city may receive migrants, experience natural population growth and attract workers or students. At the same time, land may be limited or expensive, and housing construction may be too slow, costly or poorly planned. Therefore, analysis must consider in-migration, population growth, available land and the speed and capacity of construction together. B is correct because it includes both demand-side and supply-side factors. A is incomplete because births are only one source of population change. C is incomplete because weather may affect living conditions but does not explain the whole housing crisis. D is irrelevant because a city’s name gives no causal explanation. Memory cue: housing problems are understood by comparing people needing homes with homes being created.

Correct answer: A. When skills, education and jobs are available

Answer: A. A large working-age population can support development when people are healthy, educated, trained and able to find productive work. Education and skill training improve productivity, while suitable jobs allow workers to earn incomes, support families, pay taxes and contribute to goods and services. This possible economic benefit is often called a demographic dividend, but it is not automatic. A is correct because it provides the conditions needed to turn a large workforce into an advantage. B is wrong because unemployment wastes skills and may create social and economic pressure. C is wrong because weak education reduces the ability of workers to obtain productive employment. D is wrong because treating migration as a crime does not create skills or jobs and may prevent people from seeking opportunities. Memory cue: a young workforce becomes a dividend only when people can learn, work and earn.

Correct answer: A. When jobs, skills and health facilities are insufficient

Answer: A. A large workforce is not automatically an advantage. It becomes a burden when the economy cannot provide enough suitable jobs, when workers lack useful skills and when health services are inadequate. In that situation, many people may remain unemployed or underemployed, household incomes may stay low and public services may face extra pressure. A is correct because it lists the main missing conditions that prevent a workforce from becoming a development resource. B is wrong because strong industry and education usually improve employment and productivity. C is wrong because rapidly growing employment creates more opportunities rather than a burden. D is wrong because available skill training helps workers become employable. The same number of working-age people can therefore be an opportunity in one place and a challenge in another, depending on education, health and employment conditions. Memory cue: people are potential workers; opportunities and capabilities decide the result.

Correct answer: A. Population continuing to grow for some time because of a young age structure even after the birth rate falls

Correct answer: A. Population momentum is the continued growth of a population for some time even after fertility or birth rates begin to decline. The main reason is age structure. If a population contains a large share of young people, many of them will enter reproductive ages in the future. Even when each woman has fewer children than before, the large number of potential parents can keep the total number of births substantial. A is correct because it connects continued growth with a young age structure after the birth rate falls. B is wrong because a rising death rate does not automatically make a population zero. C is wrong because population momentum is not the same as zero migration. D is wrong because an increase in area does not directly raise the birth rate. Memory cue: a young population can keep growth moving forward because many future parents are already present.

Correct answer: A. Changes in age structure and service demand

The correct answer is A: administration should prepare for changes in age structure and service demand. A continuously declining growth rate means that the number of new people being added is becoming smaller relative to the existing population. Over time, this can alter the balance between children, working-age adults and older people. The exact future pattern depends on fertility, mortality and migration, but planning must consider changing needs. Services such as schools, health care, employment support and care for older people may not be needed in the same proportions as before. Option A is correct because population change affects public planning. Option B is unrelated to demographic growth. Option C concerns soil characteristics, not population structure. Option D is wrong because density remains useful for understanding how people are distributed. Memory cue: a changing growth rate means changing future population needs, not a change in physical geography.

Correct answer: A. Total population may decline

Direct answer: A, total population may decline. Use the formula total change = natural increase + net migration. Suppose natural increase is +500 but net migration is −700. The result is +500 + (−700) = −200, so the population decreases by 200. The negative migration is larger in magnitude than the positive natural increase and therefore outweighs it. A is correct; “may” is appropriate because the exact result depends on the values, but under the stated condition the total change is negative. B is wrong because positive natural increase alone does not guarantee overall growth. C is wrong because stability would require the two values to cancel exactly. D is wrong because migration is included directly in the total-change calculation. Memory cue: compare magnitudes after keeping the signs; the larger negative term can turn growth into decline.

Correct answer: A. 700

Direct answer: A, 700. Solve in two clear steps. Step 1: natural increase = births − deaths = 2,800 − 1,700 = 1,100. Step 2: total growth = natural increase + net migration = 1,100 + (−400) = 700. Thus the area still has positive growth, but it is smaller than the natural increase because more people left than entered. A is correct. B, 1,100, is only the natural increase and forgets the negative migration. C, 1,500, incorrectly adds 400 instead of subtracting it. D, 4,900, incorrectly combines the figures rather than applying the population-change formula. The negative sign is essential: it represents a net loss through migration. Memory cue: calculate births minus deaths first, then add the signed migration value.

Correct answer: B. Higher

Direct answer: B, higher. Growth rate is usually expressed as the increase divided by the initial, or base, population and multiplied by 100: growth rate = (absolute increase ÷ base population) × 100. When the same increase is divided by a smaller base, the resulting fraction and percentage are larger. For example, an increase of 100 is 10% of 1,000 but 20% of 500. A is wrong because the smaller denominator makes the rate higher, not lower. B is correct for this reason. C is wrong because a positive absolute increase cannot produce a zero rate. D is wrong because the increase is not negative; a smaller base does not make a positive increase negative. Do not confuse absolute increase, which is the same in both areas, with growth rate, which considers the starting population. Memory cue: same gain + smaller starting base = larger percentage.

Correct answer: C. 25 percent

Direct answer: C, 25%. First find the absolute increase: 80 lakh − 64 lakh = 16 lakh. Next compare that increase with the initial population, not the final population: growth percentage = (16 ÷ 64) × 100 = 0.25 × 100 = 25%. The unit “lakh” cancels because both values use the same unit. A, 16%, incorrectly uses the increase as the percentage without comparing it with the base. B, 20%, does not result from the correct denominator. C is correct because it uses the standard percentage-growth formula. D, 40%, is an overestimate and may arise from an incorrect operation. Always use the initial population as the base unless the question gives another definition. Memory cue: increase ÷ initial value × 100.

Correct answer: A. Density may rise if population increases and area remains same

Direct answer: A. Population density means the number of people per unit of area, commonly written as population ÷ area. If the population increases while the area stays constant, the numerator rises and density may rise. A is correct because it states the necessary condition rather than claiming that growth always changes density in the same way. B is wrong: population growth does not automatically enlarge the geographical area. C is wrong because density depends on both population and area; death rate can influence population but does not alone determine density. D is wrong because growth measures change over time, whereas density describes population concentration at a place and time. If area also expands, density might stay unchanged or even fall, so the condition in A matters. Memory cue: density is people per area; growth is change in people over time.

Correct answer: A. Because age structure and spatial distribution can change

The direct answer is A. Zero growth usually means that the total population is stable over a particular period; it does not mean that nothing has changed inside the population. Births, deaths, migration, and movement between places can alter the age structure and spatial distribution while the total remains similar. A region may have more elderly people and fewer children, requiring different health, care, and education services. People may also shift from villages to towns, creating new needs for transport, housing, water, and employment in different locations. Option B is wrong because zero growth does not mean zero population. C is wrong because stable numbers still need services. D is wrong because reliable census and demographic data remain important. Memory cue: stable total does not mean stable composition or stable location.

Correct answer: A. Because the actual number of people and service demand may be hidden

The direct answer is A. A percentage shows the rate of change relative to a starting population, but it does not by itself show the number of people affected or the total population needing services. A small percentage applied to a very large population can represent many additional people. Conversely, a high percentage in a small population may represent a smaller absolute increase. Policy therefore needs both relative growth and absolute numbers, along with the time period and the distribution of people. Option B is wrong because percentages are useful for comparing growth rates. C is wrong because population change is often expressed as a percentage. D is wrong because growth is always interpreted over a specified period. Memory cue: percentage tells how fast; absolute number tells how many. Good policy uses both.

Correct answer: A. Fast in-migration occurs because of jobs in an industrial area

Direct answer: A. A national average combines many different places, so it can hide strong local contrasts. An industrial area with factories, offices or other jobs may attract workers and their families from other regions. This in-migration adds people locally and can make the area’s population grow much faster than the national average, even if birth and death rates are not unusual. B would produce little local difference because every area grows equally. C cannot describe ordinary population growth because there are no residents at the starting point. D gives less reason for people to move into the area. The key idea is scale: national figures and local conditions may tell different stories. Memory cue: averages can hide hotspots of growth.

Correct answer: A. Ignoring resource limits and service capacity

Direct answer: A. Sustainable development means meeting present needs while protecting the ability of people in the future to meet their needs. Population planning must therefore consider how much water, land, food, energy and public-service capacity are available. Ignoring these limits can create shortages, overcrowded services, environmental pressure and unequal access. B is a suitable approach because education and health improve human well-being and planning capacity. C is suitable because careful water and land management protects important resources. D is suitable because skills and employment help people earn livelihoods and use the working-age population productively. Memory cue: sustainable planning balances people, resources, services and future needs.

Correct answer: A. Births, deaths, migration, base population, time period, age structure, resources and service capacity

Direct answer: A. A mature analysis uses several connected dimensions rather than one isolated fact. Births and deaths show natural change, while migration shows movement into or out of an area. The base population and time period are needed to interpret the size and rate of change correctly. Age structure helps explain future needs and the likely size of the working population. Resource and service capacity show whether water, land, schools, healthcare, housing and jobs can support the population. B, C and D leave out most relevant demographic and planning information; mountains, rivers, soil, area or colour alone cannot measure population growth. Memory cue: analyse population through components, time, structure and carrying capacity.

Correct answer: A. Enough births to keep generation size nearly stable in the long run

Answer: A is correct. Replacement-level fertility refers to a level of childbearing at which one generation is, in the long run, roughly replaced by the next generation, subject to survival and population conditions. The basic idea is not that the total population becomes fixed immediately; population may continue to change because of age structure, population momentum and migration. A is correct because it connects replacement level with the continuation of generation size over time. B is wrong because rainfall and river filling are hydrological ideas. C is wrong because migration changes the distribution or size of populations in places but does not define replacement fertility. D is wrong because land formation is a geological process. Memory cue: replacement means one generation replacing another, not replacing land or water.

Correct answer: A. Because education, health, employment and resource distribution are also linked

Correct answer: A. Population growth is not merely about counting how many people live in a country. A large or rapidly growing population creates needs for schools, hospitals, housing, food, water, transport and employment. The challenge also depends on how people are distributed, their age structure, their health and education, and whether resources and opportunities are shared fairly. If population growth is accompanied by better human development, people can contribute skills and work to society. If services and jobs do not expand sufficiently, families and governments may face pressure. B is wrong because population numbers are important for planning. C is wrong because births and deaths are real components of population change. D is wrong because migration occurs within and across regions. Memory cue: population issue = people plus their needs, opportunities and resources.

Correct answer: A. Future natural growth may decline

Correct answer: A. Young adults often make up an important part of the working and child-bearing-age population. If many young people leave a region, the place may have fewer people in the age groups that commonly form families and have children. As a result, the number of births in that region may fall in the future, so natural increase may decline. This is a possible effect, not an unavoidable result, because age patterns, family decisions and later return migration can differ. B is wrong because the departure of young people does not guarantee a higher birth rate; it may reduce the number of potential parents locally. C is wrong because migration cannot make deaths disappear. D is wrong because a census remains useful for measuring the population and its distribution. Also distinguish natural growth from total population change: out-migration can reduce total population directly, while the smaller young-adult group may affect future births. Memory cue: loss of young adults can mean fewer future births.

Correct answer: A. By increasing pressure on resources and services for both families and government

Correct answer: A. A high population growth rate means that the number of people and dependants can rise quickly. Families may need to divide limited income among more children, leaving less money per child for food, education, healthcare and skill development. Governments must also provide more schools, clinics, water, housing and jobs. If public services and employment do not expand as quickly as the population, competition for opportunities can increase and living conditions may remain poor. Poor education and health can then reduce people’s ability to obtain stable, well-paid work, which may keep the next generation in poverty. This is the cycle: limited income reduces investment in people, and limited human development makes it harder to improve income. A high growth rate does not automatically cause poverty in every situation, but it can increase pressure when resources and services are insufficient. B and C are unrelated. D is wrong because population growth does not automatically create employment. Memory cue: more dependants plus limited services can reinforce poverty.

Correct answer: A. When the total population is very large and millions are still added every year

Correct answer: A. A growth rate is a percentage, while annual population addition is an absolute number. Even when the percentage rate falls, a very large population base can produce a large number of additional people each year. For example, a small percentage of a huge population may still represent millions of people. Planners therefore need to continue preparing schools, hospitals, housing, transport, water supply, food systems and employment opportunities. This idea is sometimes called the effect of a large base: the rate can slow before the total population stops increasing. B is wrong because the question describes an ongoing addition of people, and in real planning births are not simply ignored. C is impossible as a general population condition and would not remove the need for services. D is wrong because land is not infinite, and even a larger area would not automatically provide equal access to jobs or services. Memory cue: low percentage does not always mean low number; always check the base population.

Correct answer: A. Differences in birth, death and migration rates among regions

Correct answer: A. Regions do not always have the same birth rate, death rate or migration pattern. Differences in education, healthcare, age structure, employment, income, living conditions and social practices can influence births and deaths. Differences in jobs, wages, facilities and safety can attract people to some regions and cause out-migration from others. These processes produce different rates of population growth and can create regional imbalance. B and C are wrong because equal employment or equal education would tend to reduce differences rather than explain them; even then, other demographic factors could still vary. D is wrong because the physical area of states does not determine population growth by itself. A small area may grow quickly, while a large area may grow slowly, depending on births, deaths and migration. Also remember that regional imbalance concerns variation between places, not merely the total national population. Memory cue: unequal demographic rates create unequal regional growth.

Correct answer: A. By considering population number, growth rate, composition, resources and migration together

Direct answer: A is correct. A balanced evaluation asks several connected questions: How many people are there? How fast is the number changing? What is the age and sex composition? Are resources and services adequate? Are people moving into or out of the area? These factors together show both the size and the consequences of population change. B is wrong because a rumour is not reliable evidence and one year may not show a trend. C is wrong because map decoration gives no demographic measurement. D is wrong because births are only one component; deaths, migration and population composition also matter. A useful memory cue is “number, rate, structure, resources, movement”—do not judge growth from one figure alone.

Correct answer: A. Total population may decline

Direct answer: A is correct. Total population change is calculated as natural increase plus net migration. Natural increase is births minus deaths. Suppose natural increase is +500, but net migration is −800. The total change is +500 + (−800) = −300, so the population declines by 300. The word “more negative” is important: the loss caused by outward migration is larger than the gain from natural increase. B is wrong because natural increase alone does not decide the total. C is wrong because stability would require the positive and negative components to cancel exactly. D is wrong because migration is explicitly part of total change. Memory cue: keep the signs: positive adds, negative subtracts.