Population Growth

Correct answer: A. When population grows rapidly and food production or distribution is weak

The direct answer is A: food security is most seriously threatened when population grows rapidly while food production or distribution is weak. Food security means that people can obtain enough safe and nutritious food. Rapid population growth increases the number of people who must be supplied. If farms, storage, transport, markets or distribution systems cannot expand or function properly, total food availability may not reach everyone, even when some food exists in the region. Option A combines increasing demand with a weak supply system, so it creates the greatest risk. Option B is wrong because production above demand generally reduces shortage pressure. Option C is less likely to create pressure because a declining population usually reduces demand, other conditions being equal. Option D is wrong because strong distribution helps food reach people. Food security also depends on access and affordability, but the question clearly identifies weak production or distribution as the risk. Memory cue: food security needs enough food and a reliable way to reach people.

Correct answer: A. Because the base population and growth rate also affect its meaning

The direct answer is A: the base population and the growth rate are also needed to interpret absolute growth. Absolute growth tells us the actual number added, usually calculated as new population minus old population. However, the same numerical increase can have very different meanings for areas of different sizes. An increase of 50,000 may be a very large change for a small town but a small percentage change for a large city. The growth rate supplies this relative context by comparing the increase with the base population over a stated period. Option A is correct because both starting size and rate help explain the importance of the increase. Option B is false because absolute growth is commonly calculated. Option C is false because birth rate measures births, not the total numerical change. Option D is false because growth must be related to a time period. Migration and deaths may also influence the absolute change, so births alone cannot explain it. Memory cue: absolute growth tells “how many”; growth rate tells “how large compared with the starting population.”

Correct answer: A. Employment and resource demand may increase

The direct answer is A: demand for employment and resources may increase. Rapid population growth means that more people need jobs, food, water, housing, education, health care, transport and other services. If per-capita income remains stable, average income has not risen enough to automatically provide greater purchasing power or better living conditions for each person. The economy may therefore face pressure to create more work and distribute limited resources among a larger population. Option A is correct because it describes the likely social and economic pressure without claiming that the result is unavoidable in every case. Option B is wrong because stable per-capita income does not make everyone richer. Option C is wrong because more people generally need more services, not none. Option D is wrong because population remains the number of people; its definition does not change. Other factors such as productivity, employment policy and resource management also matter. Memory cue: more people with unchanged average income means greater competition for jobs and resources.

Correct answer: A. Pressure on human capital development

Correct answer: A, pressure on human capital development. Human capital means the knowledge, skills, health, and abilities that help people work productively and improve their lives. Very rapid population growth increases the number of children and young people who need schools, teachers, training, and health services. If the education system is weak, it may not provide these opportunities adequately. As a result, the growing population may not develop its full potential, and the area may face difficulties in employment, productivity, income, and public services over the long term. A is correct because rapid growth increases the need for education and skills, while weak education limits their development. B is wrong because population growth and education do not directly increase the depth of the sea. C is wrong because rapid growth does not make the population immediately zero. D is wrong because an area and a birth rate are different geographical and demographic concepts. Memory cue: people become stronger human capital through education, skills, and health.

Correct answer: A. When rural land pressure rises and cities offer job opportunities

Correct answer: A, when rural land pressure rises and cities offer job opportunities. Rural-to-urban migration is usually influenced by both push and pull factors. Rapid population growth can increase pressure on farmland, housing, water, and rural employment. These conditions push some people to leave villages. At the same time, cities may attract them with jobs, higher wages, education, hospitals, transport, and other services. When rural pressure and urban attraction operate together, the movement from villages to towns and cities can become stronger. A is correct because it contains both the rural push factor and the urban pull factor. B is wrong because plentiful rural work and a lack of city opportunities reduce the reason to migrate. C is wrong because migration cannot increase if it is legally impossible. D is wrong because declining population does not by itself create the stated population-growth pressure. Memory cue: push from the village plus pull from the city increases migration.

Correct answer: A. Because the total population can still put pressure on services

Correct answer: A, because the total population can still put pressure on services. A growth rate tells us how quickly population is changing; it does not tell us that the existing population has disappeared. An area may already contain many people, so schools, hospitals, housing, water supply, transport, and jobs may continue to face heavy demand even after the rate of increase falls. Also, a lower rate can still mean that the population is increasing, only more slowly. Policymakers must therefore consider the present population size, its age structure, future births, migration, and available services. A is correct because existing demand does not vanish immediately when growth slows. B is wrong because a low rate is not the same as zero population. C is wrong because slower growth still requires careful planning. D is wrong because a lower growth rate does not mean the death rate will always be zero. Memory cue: slower growth means slower addition, not removal of existing people.

Correct answer: A. When the area is limited and the population is growing rapidly

Correct answer: A, when the area is limited and the population is growing rapidly. Population growth means a change in the number of people over time, whereas population density means the number of people living per unit of area. If the available land is limited and the number of people rises quickly, more people must share the same space. This can increase pressure on housing, water, roads, schools, sanitation, and other resources. A is correct because it combines rapid numerical increase with limited space, making density especially important. B is less suitable because negligible growth creates less immediate growth-related pressure. C focuses only on natural change and does not measure how people are spread over land. D describes declining population with unchanged area, which generally lowers density rather than creating rapid growth pressure. Memory cue: growth asks “how many more?”, while density asks “how many in each unit of space?”

Correct answer: A. Pressure rises when growth exceeds resource capacity

Correct answer: A, pressure rises when population growth exceeds resource capacity. Resource-carrying capacity means the amount of people and activity that available resources and systems can support over a given time without serious damage or shortage. Resources include water, food, land, energy, housing, and public services. If population increases faster than these resources can be supplied, competition and pressure may rise. This can appear as shortages, overcrowding, environmental degradation, or stress on services. A is correct because it connects population increase with the limits of available resources. B is wrong because resources are not unlimited; their quantity and ability to renew vary. C is wrong because population needs directly affect resource demand. D is wrong because resources do not automatically double merely because population rises; supply depends on nature, technology, management, and planning. Memory cue: carrying capacity is a limit to support, not a guarantee of unlimited supply.

Correct answer: A. Do not draw a full conclusion from one indicator

Correct answer: A, do not draw a full conclusion from one indicator. Population growth is a result of several demographic processes and must be studied in context. Births and deaths affect natural change, while immigration and emigration affect the population through migration. The time period, starting population, age structure, percentage rate, absolute increase, and local conditions also matter. A is correct because one figure alone may hide important facts; for example, the same percentage increase can represent very different numbers of people in small and large populations. B is wrong because migration can significantly change total population. C is wrong because removing the time period makes a rate difficult to interpret. D is wrong because birth rate alone does not equal actual population growth; deaths and migration must also be considered. Memory cue: read population data with components, time, base, and place.

Correct answer: B. When the birth rate is still fairly high

Correct answer: B, when the birth rate is still fairly high. Population growth depends on the balance between additions and losses. Births add people, while deaths remove people; migration can also add or remove people. If the death rate is low but the birth rate remains fairly high, births are still much greater than deaths, so the population can continue to grow at a noticeable rate. B is correct because a high birth rate offsets the effect of low deaths and keeps natural increase positive. A is wrong because a very low birth rate and negative migration would reduce growth, possibly producing decline. C is wrong because if everyone moved out, the area would lose population rather than maintain growth. D is wrong because a zero base population cannot produce ordinary positive growth without people entering first. Memory cue: compare the birth rate with the death rate; the gap matters.

Correct answer: C. Drawing a final conclusion about service demand only from the percentage

Correct answer: C, drawing a final conclusion about service demand only from the percentage. A percentage growth rate describes relative change, but it does not by itself reveal the actual number of additional people. The starting population, time period, absolute increase, age structure, migration, and existing services must also be considered. A is correct because a rate has meaning only when its time period is known. B is correct because absolute increase is the actual numerical change in population. D is correct because migration can contribute to total population change along with births and deaths. C is wrong because the same percentage may represent a small number in one area and a very large number in another. Therefore, service demand cannot be judged finally from percentage alone. Memory cue: percentage tells relative change; base population tells the size of the real burden.

Correct answer: A. When factors such as income, employment, education, and resource distribution also differ

Correct answer: A. Population growth by itself cannot prove that poverty has increased or decreased. Poverty is also influenced by income distribution, availability of jobs, education, health services, technology, prices, and access to land and other resources. Therefore, if these social and economic factors differ between places or periods, a direct conclusion would be unsafe. Option A is correct because it explicitly identifies the additional factors that may change the result. Option B is not correct because observing data over time usually improves comparison. Option C is not correct because births, deaths, and migration are the basic components used to measure population change; counting them does not itself make the conclusion wrong. Option D is not correct because knowing the two years helps calculate change, although it still does not explain poverty by itself. Memory cue: correlation is not causation—two trends moving together do not prove that one alone caused the other.

Correct answer: A. A decrease of 300

Correct answer: A, a decrease of 300. First calculate natural increase: births minus deaths = 4,000 - 2,500 = 1,500. Then include net migration with its sign: total change = natural increase + net migration = 1,500 + (-1,800) = -300. A negative result means the population decreases by 300, not that it increases by 300. Option A is correct. Option B has the correct number but reverses the meaning of the negative sign. Option C gives only the natural increase and ignores migration. Option D incorrectly adds births and deaths instead of subtracting deaths and also ignores the negative migration. Memory cue: total population change = (births - deaths) + net migration; always preserve the plus or minus sign of migration.

Correct answer: A. Balancing population growth with resource capacity, education, health, employment, and environmental management

Correct answer: A. Sustainable development means meeting present needs while protecting the ability of future generations to meet their needs. Population growth can increase the need for food, water, housing, schools, health care, jobs, and energy. Planning must therefore match population needs with the available resources and the environment’s capacity. Option A is correct because it combines resource management with education, health, employment, and environmental protection. Option B is wrong because growth is not automatically beneficial; its effects depend on planning and distribution. Option C is wrong because ignoring limits can cause pressure on land, water, and ecosystems. Option D is wrong because education and health are essential for human well-being and responsible development. Memory cue: sustainable development means balance—people, resources, and the environment must be considered together.

Correct answer: A. Skill development, employment, and preparation of urban services

Correct answer: A. A low overall growth rate does not mean that the population structure and service needs remain unchanged. In-migration of young people can enlarge the working-age population and increase demand for training, jobs, housing, transport, schools, health care, and other urban services. Option A is correct because skill development helps people use their abilities, employment planning supports livelihoods, and urban preparation manages the new demand. Option B is wrong because a census or reliable population data are needed for planning. Option C is wrong because migration is one of the processes that changes population size and composition. Option D is wrong because new residents still need services even if the natural growth rate is low. Memory cue: judge population change by both size and composition; migration may change composition quickly.

Correct answer: A. A decrease of one lakh

Correct answer: A, a decrease of one lakh. First find the natural increase: six lakh births minus four lakh deaths equals two lakh. Next add the net migration, which is negative three lakh: total change = two lakh + (-three lakh) = negative one lakh. A negative total means the population falls by one lakh. Option A is correct. Option B reports the natural increase only and ignores the loss through migration. Option C uses the size of the negative migration but changes its meaning into an increase. Option D treats births as the entire change and ignores deaths and migration. The correct general formula is total population change = (births - deaths) + net migration. Memory cue: a negative migration value is subtracted from the natural increase, not added as a positive number.

Correct answer: B. Absolute growth can still be large

Correct answer: B. Growth rate is usually expressed as a percentage, while absolute growth is the actual number added to the population. A declining rate means that the percentage increase is becoming smaller, but it does not automatically mean that the number added is small or zero. For example, 1% of a population of 10 million is 100,000 people, which is still a large addition. Option B is correct because a large base can produce a large absolute increase even at a lower percentage. Option A is wrong because a declining rate is not the same as zero growth. Option C is wrong because the population declines only when the total change becomes negative, not merely when the rate falls. Option D is wrong because growth rate remains useful for comparing population change across places and periods. Memory cue: percentage tells the proportion; absolute growth tells the actual count.

Correct answer: B. 2 per thousand

Correct answer: B, 2 per thousand. First calculate the rate of natural increase: birth rate - death rate = 12 - 7 = 5 per thousand. Then include net migration: total growth rate = 5 + (-3) = 2 per thousand. Thus the population still grows, but only by two persons per thousand people during the stated period. Option A is wrong because it stops after calculating natural increase and ignores migration. Option C incorrectly uses the magnitude of migration as the final answer. Option D adds the rates instead of subtracting deaths and the negative migration. The unit remains “per thousand” throughout the calculation. Memory cue: total rate = birth rate - death rate + net migration rate; a negative migration rate reduces growth.

Correct answer: B. Twenty percent

The correct answer is B: twenty percent. Growth percentage tells us what fraction the increase represents of the previous population. Use the formula: growth percentage = (increase ÷ previous population) × 100. Here, the increase is 9 lakh and the previous population is 45 lakh. Therefore, (9 ÷ 45) × 100 = 0.2 × 100 = 20%. The lakh unit cancels because both values use the same unit. Option A is incorrect because 9 lakh is not one-tenth of 45 lakh. Option B is correct because 9 is one-fifth of 45, and one-fifth equals 20%. Option C would require an increase of 13.5 lakh. Option D would require 20.25 lakh. Memory cue: always use the earlier population as the base.

Correct answer: A. Total growth can be low or negative

The correct answer is A: total growth can be low or negative. Natural increase is births minus deaths. If births are greater than deaths, natural increase is positive. However, total population change also includes migration. Emigration means people leave the area, so it reduces the population; it is negative net migration when out-migration is greater than in-migration. If the number leaving is nearly equal to or greater than the natural increase, total growth may become very small or even negative. Option A correctly includes both possibilities. Option B is wrong because positive natural increase does not guarantee rapid total growth. Option C is wrong because migration directly changes population size. Option D is wrong because positive natural increase does not mean the birth rate is zero. Cue: total growth depends on natural increase plus net migration.

Correct answer: A. Because the young population base affects future births

The correct answer is A. A large young population means that many people are entering or are already in the child-bearing age groups. Even when the average number of children per person is falling, the large number of potential parents can keep the total number of births high for some time. This continuing effect is called population momentum. Option A is correct because the size and age structure of the population influence the number of births, not only the birth rate. Option B is wrong because birth rate remains an important measure. Option C is wrong because death rates are not automatically zero. Option D is wrong because migration can be measured and is separate from the age-structure effect. A useful cue is: a falling rate does not immediately remove a large young base; many potential parents can sustain growth temporarily.

Correct answer: B. The growth rate may slow down

The correct answer is B: the growth rate may slow down. Natural population growth depends mainly on the difference between the birth rate and the death rate. If both rates decline but the difference between them becomes smaller, fewer births remain above deaths, so natural growth tends to decrease. For example, a fall from 30 births and 10 deaths to 18 births and 8 deaths reduces the gap from 20 to 10, even though both rates have fallen. Option A is wrong because a narrowing gap does not support very rapid growth. Option B is correct because the smaller gap generally means slower natural growth. Option C is wrong because a smaller growth rate does not make the population immediately zero. Option D is wrong because nothing in the information proves that migration will increase. Memory cue: for natural growth, compare the gap, not just whether each rate is rising or falling.

Correct answer: C. Twenty percent

The correct answer is C: twenty percent. First find the absolute increase: 1 crore 20 lakh − 1 crore = 20 lakh. Next compare this increase with the previous population, which was 1 crore. One crore equals 100 lakh, so the percentage is (20 lakh ÷ 100 lakh) × 100 = 20%. Option C is correct. Option A would represent an increase of only 10 lakh on a base of 1 crore. Option B incorrectly treats 20 lakh as 12% of 1 crore; 12% would be 12 lakh. Option D would require an increase of 40 lakh. The important step is to use the previous population as the base and convert units consistently. Memory cue: one crore is 100 lakh, so 20 lakh out of one crore is 20 out of 100, or 20%.

Correct answer: B. It can be moderate or positive

The correct answer is B: total growth can be moderate or positive. Natural increase is found by subtracting the death rate from the birth rate. Even if the birth rate is low, a still lower death rate creates a positive natural increase. In addition, immigration brings people into the area and adds positive net migration. Together, positive natural increase and high immigration can produce moderate or even high total growth. Option A is wrong because the area is not forced to have negative growth. Option B is correct because it considers both natural change and migration. Option C is wrong because population change can be calculated when the relevant data are available. Option D is wrong because total growth does not depend only on area. Cue: low birth rate does not automatically mean population decline; compare births with deaths and then include migration.

Correct answer: A. Employment pressure and possible migration

The correct answer is A. When the number of people increases faster than the number of available jobs, competition for work becomes stronger. This may create unemployment, underemployment or pressure on existing jobs. Some people may migrate to places where they expect better employment opportunities. Option A is correct because it connects rapid population growth with limited livelihood opportunities without claiming that migration must happen in every case. Option B is wrong because low job growth cannot provide immediate work for everyone. Option C is wrong because employment conditions do not make the birth rate automatically zero. Option D is wrong because population change does not physically double the district’s area. The situation also shows why education, skills, infrastructure and employment planning are important. Memory cue: when people grow faster than jobs, livelihood pressure grows.