Population Growth

Correct answer: A. Pressure on services will increase

The direct answer is A: pressure on services will increase. Services include schools, hospitals, drinking water, sanitation, housing, transport and electricity. When population grows rapidly, more people need these facilities. If facilities expand slowly, the same limited capacity must serve more users, so demand may exceed supply. This can cause overcrowding, longer queues, shortages, heavier workloads and reduced quality. Option A is correct because rapid growth raises demand while slow expansion limits supply. Option B is wrong because more people do not eliminate the need for services; they usually increase it. Option C is wrong because inadequate services may create hardship, but they do not automatically make population decline. Option D is wrong because measuring area has no necessary connection with service pressure. Memory cue: fast population growth plus slow services equals rising pressure.

Correct answer: A. Rapid growth can increase demand for education, health and skill services

The direct answer is A: rapid population growth can increase demand for education, health care and skill-development services. Human development is concerned with people’s well-being and opportunities, so planning must consider how many people need schools, medical care, training and other facilities. Growth can create a larger future workforce and market, but if services and resources do not expand adequately, access and quality may come under pressure. Option A is correct because it states a possible and practical relationship without claiming that growth always has one result. Option B is wrong because population size and age structure affect service needs. Option C is too absolute: population growth does not always end human development; outcomes depend on planning, resources and access. Option D is wrong because human development depends on many social, economic, health and educational factors, not only mountains. Memory cue: more people mean more development needs to plan for.

Correct answer: A. Some population growth may continue for some time

Correct answer: A, some population growth may continue for some time. Population growth depends not only on the present growth rate but also on the age composition of the population. When a large share of people is young, many of them may enter reproductive ages in the future. Even if each family has fewer children and the growth rate is declining, the large number of potential parents can keep births relatively high for some time. This delayed continuation of growth is called population momentum. Option A is correct because the population may keep increasing before it stabilises or begins to decline. Option B is wrong because a declining rate does not mean that the number of people instantly becomes zero. Option C is wrong because death rate and area are different demographic and geographical ideas. Option D is wrong because migration is not automatically stopped by a declining growth rate. Memory cue: a large young population gives growth “momentum,” like a moving object that does not stop instantly.

Correct answer: A. When food production is less than demand

Correct answer: A, when food production is less than demand. Food security means that people can obtain enough safe and nutritious food. First compare the amount of food available with the amount needed by the population. If population increases while food production does not keep pace, demand becomes greater than supply. This can create pressure on food availability, access, and affordability. Option A is correct because a shortage relative to demand makes the effect of population growth on food security stronger. Option B is wrong because production greater than demand generally reduces shortage pressure, although distribution still matters. Option C is wrong because a decreasing population usually reduces total food demand, all else being equal. Option D is not the best answer: strong distribution can improve access, but it does not remove the problem if total production is below demand. Memory cue: food security depends on both supply and access; first check whether food supply can meet demand.

Correct answer: A. Understand absolute growth, growth rate, natural increase, and actual growth separately

Correct answer: A. Several population terms sound similar but do not mean the same thing. Absolute growth is the actual numerical change in population between two dates. Growth rate expresses change in relation to the initial population, usually as a percentage over a specified period. Natural increase is based on the difference between births and deaths, while actual or total population change also considers migration. Therefore, the time period and the definition being used must be read carefully. Option A is correct because separating these ideas prevents calculation and interpretation errors. Option B is wrong because treating them as identical creates confusion. Option C is wrong because a rate or change has meaning only with a time period. Option D is wrong because migration can affect actual population change. Memory cue: ask “number, percentage, births minus deaths, or migration included?” before answering.

Correct answer: B. In-migration can maintain total growth

Answer: B, in-migration can maintain total growth. Population change is not determined by births alone. A useful basic idea is: total population change is influenced by natural change, which includes births and deaths, together with migration. If the birth rate falls, natural increase may become smaller. However, people entering the area from elsewhere through in-migration add to the population and may partly or fully offset that reduction. Option B is correct because it says migration can maintain growth, not that it must do so in every case. Option A is incorrect because it ignores migration. Option C is incorrect because the population will not always decline; enough in-migration may prevent decline. Option D is incorrect because population movement does not double the physical area. Memory cue: births and deaths are natural change; arrivals and departures are migration.

Correct answer: A. More people come from outside

Answer: A, more people come from outside. Natural increase is the balance between births and deaths. If that balance is small, a city can still gain population when many people move into it from other places. This movement into a city is called in-migration. The total population may therefore rise even though births minus deaths is low. Option A is correct because incoming residents add directly to the city’s population. Option B is incorrect because if everyone leaves, the population would fall. Option C is incorrect because zero births and zero in-migration provide no addition from either source. Option D is incorrect because a very high death rate tends to reduce natural increase, not increase the population. The exact result also depends on deaths and out-migration. Memory cue: natural increase is births minus deaths; total change also includes migration.

Correct answer: A. Local growth may reduce

Answer: A, local growth may reduce. High births add people to a village, but out-migration removes people from the village. When many young people leave, the number leaving can partly balance or even exceed the number added by births. As a result, the village’s local population growth may become smaller, stop, or possibly turn negative, depending on the actual numbers and deaths. Option A is correct because it gives a possible and balanced conclusion. Option B is incorrect because growth is not automatically infinite. Option C is incorrect because people moving out does not make the death rate zero. Option D is incorrect because migration changes population, not the physical area of the village. The word 'local' is important: the people may still be part of another place’s population. Memory cue: births add people; out-migration subtracts people from the local population.

Correct answer: A. Population can still grow if the growth rate remains positive

Answer: A. A falling growth rate means that the speed or percentage of increase is lower than before; it does not necessarily mean that the population itself is falling. For example, a population growing at 3% and later at 1% is still increasing, although more slowly, because 1% is positive. Population falls only when the relevant growth rate is negative, or when losses such as deaths and out-migration exceed additions. Option A is correct because it clearly separates a lower positive rate from a decrease in population. Option B is incorrect because a lower rate does not make the population zero. Option C is incorrect because the two ideas are not always equal. Option D is incorrect because rates are measured over a time period. Memory cue: lower positive growth is still growth; negative growth means decline.

Correct answer: A. 9 lakh

Direct answer: A, 9 lakh. Absolute increase means the actual numerical change in population, not the final population and not a percentage. Start with the final population, 99 lakh, and subtract the initial population, 90 lakh: 99 lakh - 90 lakh = 9 lakh. Therefore, the population increased by 9 lakh people. Option A is correct because it gives this difference. Option B is wrong because the difference is not 10 lakh. Option C is wrong because adding the two populations, 90 + 99 = 189 lakh, does not measure increase. Option D is wrong because 99 lakh is the final population, not the amount by which it increased. Memory cue: absolute increase means final value minus initial value; always subtract the starting number from the ending number.

Correct answer: B. 10 percent

Direct answer: B, 10 percent. First find the absolute increase: 88 lakh - 80 lakh = 8 lakh. Growth percentage is calculated by dividing the increase by the initial population and multiplying by 100: (8 / 80) × 100 = 10 percent. The initial population is the base because the question asks how much larger the population became compared with its starting size. Option A is wrong because 8 lakh is the absolute increase, not the percentage. Option B is correct because 8 is one-tenth of 80, and one-tenth equals 10 percent. Option C is wrong because the calculation does not give 12 percent. Option D is wrong because 20 percent of 80 lakh would be 16 lakh, not 8 lakh. Memory cue: growth percentage = increase ÷ initial value × 100.

Correct answer: A. 300

Direct answer: A, 300. Population change can be found by adding natural increase and net migration. Natural increase equals births minus deaths: 1,200 - 700 = 500. Net migration is negative 200, which means migration causes a loss of 200 people, so it must be subtracted: 500 + (-200) = 300. Option A is correct. Option B is wrong because 500 is only the natural increase and ignores negative migration. Option C is wrong because it does not follow the population-change formula. Option D is wrong because adding births and deaths is not the correct method; deaths reduce population rather than increase it. The sign of migration is important: positive migration adds people, while negative migration removes people. Memory cue: total growth = births - deaths + net migration.

Correct answer: A. If population grows faster than services, pressure may rise

Direct answer: A. Population growth increases the number of people who need schools, hospitals, water supply, transport and other facilities. Service capacity means how many people these facilities can adequately serve. If population grows faster than service capacity, demand can become greater than supply. Step by step: more people create more demand; unchanged facilities must serve more users; overcrowding, shortages or reduced quality may result. Option A correctly describes this possible pressure. Option B is wrong because population growth normally increases the need for services rather than making them unnecessary. Option C is wrong because population size affects demand and planning. Option D is wrong because better services do not make population become zero. Memory cue: when demand grows faster than capacity, pressure increases.

Correct answer: A. When the child population is increasing rapidly

Direct answer: A. Schools mainly serve children and young learners, so a rapid increase in the child population directly raises the need for classrooms, teachers, furniture, learning materials and transport. The reasoning is straightforward: more school-age children create greater demand; planners may then need new schools or expanded facilities. Option A is correct because it identifies the age group most closely connected with school planning. Option B is wrong because an increase only in the elderly population primarily affects health and care services, not school enrolment. Option C is wrong because no children means no ordinary demand for schools. Option D is wrong because a small, stable population creates relatively predictable and limited school demand. Memory cue: match the age group with the service it needs.

Correct answer: A. A growing population can increase demand for vaccination, hospitals and sanitation

Direct answer: A. When the number of people increases, more people may need preventive and treatment services. Health planning may therefore have to consider vaccination, hospitals, clinics, medicines, sanitation and clean water. The word 'can' is important: population growth does not automatically produce the same result everywhere, but it can increase demand if facilities do not expand adequately. Option A is correct because it connects a larger population with greater possible service needs. Option B is wrong because growth does not remove the need for health care. Option C is wrong because health planning concerns people and facilities, not only landforms. Option D is wrong because population size and health-service demand are related. Memory cue: more people generally require planning for more social services.

Correct answer: A. When the population grows and water sources are limited

Direct answer: A. A water crisis may become more serious when more people need water but the available sources remain limited. First, population growth increases household, agricultural and other demands. Second, limited rivers, wells, reservoirs or groundwater cannot provide an unlimited supply. Third, if demand rises faster than supply, shortages and pressure on water resources may increase. Option A includes both conditions: rising population and restricted water sources. Option B is generally less likely to intensify a crisis because fewer people reduce demand and more sources improve supply. Option C is wrong because an uninhabited place has no ordinary household demand. Option D is wrong because zero demand would not create a water crisis. Memory cue: water pressure rises when demand increases while supply stays limited.

Correct answer: A. With education and skills, a growing youth population can become an opportunity

Direct answer: A. A large or growing youth population can become a human resource when people receive education, useful skills, health support and suitable opportunities to work or contribute. The same population may create challenges if education, employment and basic services are insufficient, so the balanced view recognises both conditions. Option A is correct because it explains how investment in education and skills can turn young people into an opportunity. Option B is wrong because a growing population is not always only a burden; its effect depends partly on preparation and opportunities. Option C is wrong because skills strongly influence how people contribute to society and the economy. Option D is wrong because area is a geographical measure, whereas human resources refer to people and their abilities. Memory cue: people become a stronger resource when knowledge, skills and opportunities grow.

Correct answer: A. The base population and time period should be considered along with the percentage

Direct answer: A. A percentage is a relative measure, so it must be read with the base population and the time period. For example, a 20% increase over 1,000 people equals 200 people, while a 20% increase over 1,000,000 equals 200,000 people. The period also matters: a 10% increase in one year is different from 10% spread across ten years. Option A is correct because it asks us to examine the context behind the percentage. Option B is wrong because percentage alone may hide the actual number and speed of change. Option C is wrong because hiding the time period removes essential information. Option D is wrong because migration is a demographic process, not something that is automatically right or wrong. Memory cue: never read a growth rate without asking, 'From what base and over what time?'

Correct answer: A. By considering births, deaths, migration, base population, rate, age structure and service capacity together

Direct answer: A. A mature study does not rely on one statistic. It examines births and deaths to understand natural increase, migration to understand movement, the base population to interpret percentages, and the time period to understand the speed of change. Age structure shows which groups may need schools, jobs or health services, while service capacity helps assess whether facilities can meet changing demand. Option A is correct because it combines demographic causes, measurement context and planning needs. Option B is wrong because birth rate alone ignores deaths, migration and the population base. Option C is wrong because area does not by itself show population growth. Option D is wrong because migration and time can significantly change the interpretation. Memory cue: study population growth through causes, numbers, context and consequences together.

Correct answer: A. Water conservation and safe water distribution

The direct answer is A: water conservation and safe water distribution. Rapid population growth means that more people need drinking water, water for sanitation, and water for daily activities. If the available sources are limited, careless use can quickly create scarcity. Planning should therefore include protecting sources from pollution, reducing wastage, storing water safely, and distributing it fairly to homes and public services. Option A is correct because it addresses both sides of the problem: conserving a limited resource and making sure people receive safe water. Option B is wrong because counting mountains does not increase or protect water availability. Option C is wrong because stopping the census hides information; it does not reduce water demand or help planners. Option D is wrong because hiding migration prevents officials from knowing the real population and service needs. Memory cue: more people plus less water means conserve, treat, store, and distribute carefully.

Correct answer: A. The actual increase in absolute number may be hidden

The direct answer is A: the actual increase in absolute numbers may be hidden. A percentage rate tells us how large a change is in relation to the starting population, while absolute growth tells us the actual number of people added or lost. For example, a small percentage increase in a very large population can represent millions of additional people. Conversely, a higher percentage in a small population may represent a smaller numerical increase. Therefore, planners should examine both the rate and the absolute number before arranging housing, schools, hospitals, water, and employment. A is correct because relying only on a percentage can hide the real size of the change. B is wrong because a percentage does not automatically cause decline. C is wrong because the definition of migration does not change with a growth rate. D is wrong because population statistics do not make the physical area disappear. Memory cue: rate shows proportion; absolute growth shows actual people.

Correct answer: A. Healthcare and social support

The direct answer is A: healthcare and social support. Population size alone does not tell us every service need; age composition is also important. If the proportion or number of elderly people increases, the area may need more accessible medical care, regular check-ups, medicines, rehabilitation, assistance with daily activities, and social-support services. Slow overall population growth does not remove these needs because the age structure is changing. A is correct because healthcare and support are closely connected with the needs of an ageing population. B is wrong because primary schools mainly serve young children, and the question describes growth in the elderly group. C is wrong because playgrounds may be useful generally but are not the main service indicated by the stated demographic change. D is wrong because ports are related to transport and trade, not specifically to ageing. Memory cue: when age composition changes, plan services for the changing age group.

Correct answer: A. Employment pressure may increase

The direct answer is A: employment pressure may increase. A growing population can add more people who need work, but employment opportunities may not expand equally quickly. When the number of job seekers rises faster than available jobs, competition for existing work increases. Some people may face unemployment, underemployment, lower earnings, or may need to migrate in search of work. A is correct because it describes a likely pressure created by an imbalance between population growth and job creation. B is wrong because population growth does not automatically determine climate change. C is wrong because a growing population does not make the geographical area disappear. D is wrong because the birth rate remains a useful measure of births relative to population. Good planning should connect demographic change with skill development, employment generation, and public services. Memory cue: more job seekers without matching jobs means greater employment pressure.

Correct answer: A. When urban in-migration is very high

The direct answer is A: a city can grow quickly when many people move into it, even if births exceed deaths by only a small amount. Population change has two major parts: natural increase and migration. Natural increase equals births minus deaths. Net migration equals in-migrants minus out-migrants. Total population growth depends on both parts. Thus, a large positive flow of people into the city can more than compensate for a low natural increase. Option B is wrong because heavy out-migration removes people and usually slows growth. Option C is wrong because zero births and zero in-migration cannot create rapid growth. Option D is wrong because absence of employment generally reduces the attraction of a city, although other factors can sometimes influence movement. Memory cue: total growth = natural increase + net migration; always check both terms.

Correct answer: A. Local growth may be slow or negative

The direct answer is A. Births exceeding deaths create a positive natural increase, but population change also includes migration. When many young people leave, out-migration becomes large and subtracts from the local population. If out-migration is nearly equal to the natural increase, local growth may become very slow. If it is greater than the natural increase, the village population may actually decline. Option B is wrong because a positive natural increase does not guarantee doubling; the size of migration and the time period matter. Option C is wrong because migration directly changes the number of people living in the village. Option D is wrong because people moving away does not make the death rate zero. Memory cue: births minus deaths show natural increase, but adding in-migration and subtracting out-migration gives the fuller population change.