Population Growth

Correct answer: A. The village population may decrease

The direct answer is A: the village population may decrease. Moving from one place to another is called migration. When people leave a village to live, study, or work in a city, it is out-migration from the village. First, count the people living in the village. Then subtract those who leave; if fewer people enter than leave, the total population falls. Option A is correct because the number of residents can become smaller. Option B is wrong because migration does not change the physical boundary or area of the village. Option C is wrong because people moving away does not make deaths impossible or reduce the death rate to zero. Option D is unrelated and physically impossible as a result of migration. Memory cue: out-migration means people go out, so the population left behind may go down.

Correct answer: A. Births and deaths are almost equal

The direct answer is A: the population can remain almost stable when births and deaths are nearly equal. Natural change is found by comparing births with deaths. If about 100 people are born and about 100 people die during a period, the natural increase is close to zero, so the total population changes very little, assuming migration is also small. Option A is correct because gains from births nearly balance losses from deaths. Option B would usually cause rapid growth because many births are added while few people are lost. Option C would increase the population if people enter and do not leave in equal numbers; it is not a stable condition. Option D would cause a sharp decline because deaths exceed births. Remember: stable population means balance, not that no one is born or dies.

Correct answer: A. Population growth rate

The direct answer is A: the population growth rate shows how quickly population changes. A rate expresses change in relation to time, often over a specified period. Population growth depends on births, deaths, and migration; the growth rate summarizes the resulting increase or decrease. Option A is correct because it directly answers the question about speed. Option B is only the number of births in relation to population and does not include deaths or migration, so it alone cannot show the final growth speed. Option C measures deaths and is one factor affecting change, but it does not describe total growth by itself. Option D tells how many people live per unit of area; it describes concentration, not the speed of change. Memory cue: growth rate answers “how fast,” while density answers “how crowded.”

Correct answer: A. Because more people need water for drinking and daily use

The direct answer is A: more people need water for drinking and daily use. Water is needed for drinking, cooking, bathing, washing, sanitation, schools, hospitals, farming, and many workplaces. Step by step, population growth adds more households and more users. If the average use per person stays similar, total demand rises because the number of users has risen. Conservation, recycling, or improved supply can change the amount used, but they do not remove the basic connection. Option A is correct because it gives the direct human reason. Option B is wrong: mountains do not drink water, although landforms can influence water flow. Option C is wrong because rivers need not stop for demand to rise; a stopped river would concern supply. Option D is wrong because population growth does not make land disappear. Memory cue: more people usually means more basic-resource demand.

Correct answer: A. In estimating the future number of job seekers

The direct answer is A: population study helps estimate the future number of job seekers. Employment planning needs an idea of how many people may enter the working-age population and seek work in coming years. Step one is to study the present population. Step two is to examine its growth and age structure. Step three is to estimate future workers and plan education, training, industries, and other opportunities. Option A is correct because population data support this economic planning. Option B is wrong because river direction is a physical-geography or engineering issue, not the main purpose of employment planning. Option C is unrelated to population and jobs. Option D is also unrelated and is not a normal planning outcome. A useful cue is: population forecasts help planners prepare opportunities for people.

Correct answer: A. More births can increase the share of children

The direct answer is A: more births can increase the share of children. Age structure means the distribution of people among age groups such as children, working-age people, and older people. When the birth rate is high, many young children are added to the population, so the child share can rise and the population may have a younger structure. Option A is correct because births directly add people to the youngest age group. Option B is wrong because a lower birth rate generally adds fewer children, not more. Option C is wrong because newborns belong to the child group; they do not immediately become elderly. Option D is wrong because changes in births, deaths, and migration can alter the proportions of age groups. The effect may not be instant in every case, but the relationship is real. Memory cue: births first enlarge the child group.

Correct answer: A. Planning future food, water, schools and health services

The governing concept is demographic planning. Population-growth data show how many additional people may need food, drinking water, schools, hospitals, transport and employment in the future. Governments and local authorities can use such information to estimate demand, allocate budgets and expand services before shortages become severe. Option A is therefore the correct practical application. Options B and C have no necessary connection with population-growth analysis, while option D is not a meaningful planning activity. Growth information does not merely describe population; it supports evidence-based decisions about infrastructure and public services.

Correct answer: A. Water demand may increase

The direct answer is A: water demand may increase. Every additional person generally needs water for drinking, cooking, cleaning, bathing, sanitation, and other daily activities. To reason step by step, first identify the number of users; then consider the water needed by each user; finally, add their needs. If the population rises and average use does not fall enough, total demand rises. The word “may” is important because conservation, recycling, local habits, and supply conditions can affect the exact amount. Option A is correct because it states the likely relationship without saying it is identical everywhere. Option B is wrong because growing populations do not make demand zero. Option C is wrong because water remains a basic need. Option D is meaningless: water does not become weather because population changes. Memory cue: more users usually mean greater demand.

Correct answer: A. Travel and traffic demand may increase

The direct answer is A: travel and traffic demand may increase. More people usually means more journeys to schools, workplaces, markets, hospitals, and other services. More residents can also mean more goods must be brought to homes and businesses. Step by step, population growth increases the number of possible travellers; this can increase demand for buses, trains, roads, and other transport services. The actual effect depends on settlement pattern, income, technology, and transport choices, so “may” is appropriate. Option A is correct. Option B is wrong because population growth does not make every road disappear. Option C is wrong because people still need to move. Option D is wrong because population size and movement create transport demand. Memory cue: more people and activities usually mean more movement.

Correct answer: A. Future school and hospital planning

The direct answer is A: population-growth information helps plan future schools and hospitals. Good planning begins by estimating how many people will need services and where they may live. First, population data show the present number of residents. Next, the growth rate and age structure suggest future demand. If the number of children rises, planners may need more classrooms, teachers, and schools. If the total population rises, more hospitals, health workers, housing, water, and transport may also be needed. Option A is correct because schools and hospitals are public services whose capacity should match population needs. Option B is not a normal use of population data. Option C concerns creative writing, not population services. Option D does not plan a basic human service. Memory cue: population information helps plan facilities for people.

Correct answer: A. The population may decrease

The direct answer is A: the population may decrease. Population change from natural causes depends on the balance between births and deaths. When fewer people are born and more people die, losses are greater than additions. If migration does not offset this difference, the total population falls. Option A is correct because it uses “may,” allowing for the fact that people entering the area could change the final result. Option B is wrong because low births and high deaths do not normally produce constant growth. Option C is wrong because nothing in the situation indicates doubling; the likely direction is decline. Option D is meaningless and unrelated to demographic change. To solve such questions, compare births and deaths first, then remember that migration can also affect the final population. Memory cue: deaths greater than births usually mean decline.

Correct answer: A. To compare with the new population

Direct answer: A is correct because population growth is understood by comparing the earlier population with the later population. First identify the old or base population and then identify the new population. The difference between them shows the absolute increase or decrease; if needed, the percentage growth is calculated by dividing the change by the old population and multiplying by 100. Thus, the old population provides the starting point for a fair comparison. A is correct because it describes this comparison. B is wrong because weather is studied with atmospheric measurements, not population figures. C is wrong because river flow is related to drainage, slope and water conditions. D is wrong because soil colour is a soil characteristic and has no role in measuring population growth. Memory cue: growth always needs a starting value—compare old with new.

Correct answer: A. Demand for food items may increase

Direct answer: A is correct. Population growth means that the number of people who need food generally increases. Every person requires food, so the total demand for cereals, pulses, vegetables, fruits, milk and other food items can rise. Whether production actually meets this demand is a separate question; demand and supply are not automatically equal. A is correct because it states the likely effect of having more consumers. B is wrong because a growing population does not mean fewer consumers; it normally means more people requiring food. C is wrong because demand depends on the number of people, their needs and purchasing conditions, while production is the amount supplied. D is wrong because basic food is needed by all people, not only luxury consumers. The same reasoning can apply to water, housing, schools and health services. Memory cue: more people usually mean more basic needs.

Correct answer: A. An increase in the need for public facilities

Direct answer: A is correct. When population grows, more people need services such as schools, hospitals, roads, public transport, drinking water and sanitation. Existing facilities may become crowded, so governments and communities may need to expand or improve them. A does not mean that every facility must increase immediately or equally; it means that the overall requirement generally becomes greater. B is wrong because population growth means an increase in the number of people, not their disappearance. C is wrong because the physical area of a place does not become zero merely because more people live there. D is wrong because population growth does not transform mountains into seas; landforms change through geological or natural processes over long periods. The question asks for a simple social effect, not a physical change in land. Memory cue: more people require more public services.

Correct answer: A. Demand for sanitation services may increase

Direct answer: A is correct. A larger population produces greater demand for toilets, drainage, sewage treatment, waste collection and safe disposal. If sanitation facilities do not expand with the population, streets and water sources may become more difficult to keep clean, and public health can be affected. A says that the demand may increase; it does not claim that every place faces exactly the same problem or receives services equally. B is wrong because people still need sanitation, and the need generally grows with population. C is wrong because waste does not disappear by itself; it must be collected, treated or disposed of safely. D is wrong because the number of people affects the amount of waste and the scale of service required. Memory cue: more users create more waste-management responsibility.

Correct answer: B. 800

Direct answer: B, 800. First calculate natural increase: births − deaths = 1,500 − 1,000 = 500. Then include net migration: 500 + 300 = 800. Equivalently, use the full formula: total growth = births − deaths + net migration = 1,500 − 1,000 + 300 = 800. Option A is wrong because it stops after calculating natural increase and ignores migration. Option B is correct because it includes both natural increase and positive net migration. Option C is wrong because it does not follow the formula and overstates the result. Option D is wrong because it adds births, deaths, and migration without subtracting deaths. Memory cue: calculate “births minus deaths” first, then add or subtract net migration according to its sign.

Correct answer: B. 15 lakh

The direct answer is B: the absolute increase is 15 lakh. To find absolute increase, subtract the initial population from the final population. Here, final population minus initial population equals 75 lakh − 60 lakh = 15 lakh. The unit remains lakh because both given values use the same unit. Option B is correct because it is the actual difference between the two populations. Option A is wrong because 75 − 60 is not 10. Option C is wrong because 20 lakh is not the difference between the given values. Option D is wrong because 75 lakh is the final population, not the amount by which the population increased. Do not divide or calculate a percentage when the question asks for absolute increase. Memory cue: absolute increase = final value − initial value.

Correct answer: B. Decrease of 3 lakh

The direct answer is B: the population has decreased by 3 lakh. Compare the final value with the initial value. The population begins at 35 lakh and ends at 32 lakh, so the final value is smaller. The amount of decrease is 35 lakh − 32 lakh = 3 lakh. Option B is correct because it gives both the correct direction, decrease, and the correct amount, 3 lakh. Option A is wrong because it calls the change an increase even though the final value is lower. Option C is wrong because 32 lakh is the final population, not the change. Option D is wrong because 67 lakh is the sum of the two values, not the difference. A percentage decrease could be calculated separately, but it is not needed here. Memory cue: if final is smaller, subtract final from initial and write “decrease.”

Correct answer: B. 1000

The direct answer is B: the absolute growth is 1000 people. Absolute growth means the actual numerical difference between the new population and the old population. Subtract the initial value from the final value: 6000 − 5000 = 1000. Option B is correct because it gives this difference and the unit is people. Option A is wrong because the difference is not 500. Option C is wrong because 5000 is the initial population, not the amount of growth. Option D is wrong because 6000 is the final population, not the increase. No percentage calculation is needed because the question asks for absolute growth. The word “absolute” is a clue that we need the actual number, not a ratio or percentage. Memory cue: new population minus old population equals absolute growth when the new value is larger.

Correct answer: A. When resources are limited

Direct answer: A is correct. Resources such as land, fresh water, food, housing materials, and energy are needed to meet human needs. Rapid population growth increases the number of people requiring these resources. If the supply of resources is limited or grows more slowly than demand, competition and pressure increase. This may lead to shortages, higher demand for water and food, overcrowding, or greater use of land. B is wrong because truly unlimited resources would not face scarcity pressure. C is wrong because falling demand generally reduces pressure. D is wrong because a declining population usually reduces the number of users, although local shortages can still occur for other reasons. The key is the balance between demand and available supply. Memory cue: more people plus limited supply means greater resource pressure.

Correct answer: A. Pressure on housing, transport, and water services

Direct answer: A is correct. When the population of a city grows, more people need homes, roads, public transport, drinking water, drainage, electricity, schools, and health services. If these facilities do not expand at the same pace, existing systems become overcrowded and service pressure increases. A is therefore a realistic and direct urban effect of population growth. B is wrong because population growth does not normally change the depth of the sea. C is wrong because the number of city residents does not determine the height of mountains. D is wrong because moonlight is not an urban service whose supply is used up by people. The question asks about pressure on services, so focus on facilities that cities must plan and provide. Memory cue: more urban residents mean greater demand for houses, movement, and basic services.

Correct answer: A. Food demand will increase

Direct answer: A, food demand will increase. Rapid population growth means that the number of people in the area is rising quickly. Since every person needs food, the total quantity of food required generally becomes larger. The chain of reasoning is simple: more people → more consumers → greater total food demand. This does not necessarily mean that every person will receive enough food; supply, income, production, distribution and access also matter. B is wrong because a larger population does not normally reduce total food need. C is wrong because unchanged demand would be unlikely when many additional people are present. D is wrong because people continue to need food. Rapid population growth can also increase demand for water, housing, schools, health services and employment. Memory cue: count the people first—more people usually means more total needs.

Correct answer: A. Change in population over time

Correct answer: A, change in population over time. Population growth describes how the number of people in a place changes during a particular period. To understand it, compare the population at an earlier time with the population at a later time. The number may increase, remain nearly stable, or decrease; the important idea is change through time. Option A is correct because growth is a demographic measure connected with population size and time. Option B is wrong because soil texture describes the nature of soil particles, not the number of people. Option C is wrong because forest height is a vegetation characteristic. Option D is wrong because river direction is a physical-geography feature. Do not confuse population growth with population density: density tells how many people live per unit area, while growth tells how population changes over time. Memory cue: growth means change through time; density means people per area.

Correct answer: B. Population decline

Correct answer: B, population decline. Population decline means that the number of people living in a particular area becomes smaller over a specified period. This can result from more deaths than births, more people leaving than entering, or a combination of demographic and migration factors. The question asks about a decrease in the number of people, so “decline” is the appropriate word. Option A is wrong because population growth generally refers to an increase or change that raises population size. Option B is correct because decline means decrease. Option C is wrong because population density measures people per unit of area; it may change even when total population does not, if the area changes. Option D is wrong because sex ratio compares the numbers of females and males. Memory cue: decline means down; density means people per area; sex ratio means comparison of sexes.

Correct answer: B. Almost zero

Direct answer: B, almost zero. Natural increase is calculated from the balance between births and deaths: natural increase = birth rate minus death rate. If nearly the same number of people are born as die, the difference is very small, so the population gains very little through natural change. Migration is not included in natural increase; immigration and emigration are separate processes. A is wrong because very rapid growth requires births to be much greater than deaths. C is wrong because a finite population cannot have infinite natural increase, and equal births and deaths do not produce infinity. D is wrong because the question asks about natural increase, which depends only on births and deaths, not only on migration. Memory cue: when births and deaths balance, natural increase is nearly zero.