Population Growth

Direct answer: A. A growing young population can become a productive labour force, but this does not happen automatically. The young need education, useful vocational or technical skills, good health and suitable employment opportunities. When these conditions exist, a large working-age population can support production and development. Without them, the same population may face unemployment, low wages or dependence. B is wrong because youth do not always cause unemployment; outcomes depend on opportunities and preparation. C is wrong because skills affect employability and productivity. D is wrong because more people generally increase the need for work and services. Memory cue: population becomes a dividend only when people are prepared and employed.

Direct answer: A. Per-person availability depends on the relationship between the number of people and the amount of resources. If population increases faster than resources such as food, water, land or public services, the same resources must be shared among more people. Thus resource availability per person may fall and pressure on services may rise. B would generally improve the resource-to-person relationship because resources increase faster. C also reduces pressure because population falls while resources rise. D is not a meaningful population-resource situation for this comparison. The question is about a worsening ratio, not merely about a large total population. Memory cue: when the denominator grows faster than the numerator, per-person availability tends to decrease.

Direct answer: A. Urban sprawl means the outward expansion of built-up areas from a city into surrounding land. When population grows, more people need houses, roads, schools, shops and workplaces. If land inside the city is limited or costly, construction may spread into nearby rural or suburban areas. This changes land use and can create a wider, less compact settlement pattern. B is wrong because population growth normally increases, not eliminates, demand for land. C is wrong because housing demand is a major driver of expansion. D is wrong because migration into a city usually adds residents rather than immediately emptying it. Memory cue: more people plus limited inner-city space often means outward growth.

Direct answer: A, 30 lakh and 25 percent. First find the absolute increase by subtracting the initial population from the final population: 150 lakh − 120 lakh = 30 lakh. Next calculate percentage growth using the initial population as the base: (absolute increase ÷ initial population) × 100 = (30 ÷ 120) × 100 = 25%. The final population itself is not the increase, so C is wrong. B uses an incorrect percentage, and D adds the populations instead of finding their difference and also gives a wrong rate. Always use the starting value in the denominator when calculating growth from an initial population. Memory cue: difference first, then difference divided by the beginning value.

Direct answer: A. Population growth and sex ratio are different demographic ideas. Growth describes how the total population changes over a period; births, deaths and migration can contribute to that change. Sex ratio describes the relationship between females and males, commonly expressed in India as the number of females per 1,000 males. To identify the mistake, ask what is being measured: change over time means growth, while comparison of male and female numbers means sex ratio. A incorrectly treats growth as a male-female ratio. B correctly describes growth, C correctly separates the indicators, and D correctly identifies major components that influence growth. Memory cue: growth asks “how many changed?”; sex ratio asks “how are males and females balanced?”

Correct answer: A. A growing population becomes an economic opportunity only when people can develop their abilities and find productive work. Education builds basic knowledge, skill training improves employability, good health supports regular participation in work, and sufficient jobs allow people to earn and produce goods or services. When these conditions occur together, a large working-age population may create a demographic dividend. A is correct because it includes the main human-capital and employment requirements. B is wrong because weak services and few jobs turn population growth into pressure rather than opportunity. C removes training, so productivity may remain low. D describes scarcity and poor planning, which make the opportunity harder to realise. Memory cue: people become a dividend only when they are healthy, skilled and employed.

Correct answer: A. A growth rate tells how quickly population is changing, while the total population tells how many people are present. A declining rate can still be positive. For example, if the rate falls from 3% to 1%, the population may continue to rise, only more slowly. More people can mean greater household, agricultural, industrial and municipal water demand. Changes in living standards or water use can also affect demand, but among the options the continuing increase in total population is the appropriate reason. B is wrong because a declining rate does not mean the population is zero. C contradicts the stated rise in demand. D is too absolute: population size and growth can influence demand. Memory cue: “slower growth” is not the same as “negative growth.”

Correct answer: A. Absolute growth gives the actual number added, but that number is strongly affected by the starting size of a population. Annual growth rate expresses the change relative to the population and usually reports it for one year, often as a percentage. This makes comparison fairer between a large population and a small population. For example, an increase of 10,000 people may be small for a city of one million but very large for a town of 20,000. A is correct because rates support comparison across different population sizes. B and C are unrelated. D is wrong because calculating a growth rate requires reliable population data, commonly from censuses or other estimates. Memory cue: absolute growth answers “how many people”; growth rate answers “how fast compared with the starting size.”

Answer: A, the proportion of growth relative to the base population. Percentage growth compares the increase with the population at the beginning of the period. A simple expression is percentage growth = (increase ÷ base population) × 100. For example, an increase of 10,000 is 10% for a base of 100,000, but only 1% for a base of 1,000,000. Therefore, the percentage form makes comparison between differently sized populations fairer than absolute numbers alone. B describes area, not population growth. C concerns agriculture and gives no population-growth measure. D concerns rainfall, not population. A common confusion is to treat a large numerical increase as automatically a high growth rate; the denominator, or base population, matters.

Answer: A. Population explosion refers to very rapid population growth, especially when the death rate falls quickly while the birth rate remains high for a considerable period. Better health care, sanitation, food supply, and disease control can reduce deaths, but social and economic changes may take longer to reduce births. The difference between births and deaths then becomes large, producing rapid natural increase. B would not create growth if both rates were zero. C changes a physical feature and does not directly determine population growth. D would cause out-migration and could reduce the population of the region rather than produce an explosion there. Memory cue: death rate falls first, birth rate stays high, and the gap creates rapid growth.

Answer: A. Improved health facilities often reduce deaths, particularly deaths from preventable diseases and deaths among vulnerable groups. However, birth rates usually respond more slowly because they are also influenced by education, age at marriage, family planning, income, gender relations, and social attitudes. During this time lag, births remain relatively high while deaths fall, so natural increase becomes larger and population growth may initially rise. B would describe migration, not the demographic effect of better health. C changes the area, not the birth-death balance. D would reduce growth, and it is not a realistic immediate result of better health care. Common warning: lower mortality does not automatically mean an immediate lower fertility rate.

Answer: A. Birth rate measures the number of live births in a population during a specified period, commonly expressed per 1,000 people per year. It therefore indicates how quickly new members are being added. To understand natural population growth, birth rate must be compared with death rate: natural increase is linked to the difference between them. A high birth rate can produce rapid growth when deaths are fewer, while a low birth rate can slow growth. B measures rainfall, C describes a soil characteristic, and D measures transport infrastructure; none describes the addition of people. Remember that birth rate alone does not give total population change because migration and deaths must also be considered.

Answer: A. As population grows, more people generally need food, drinking water, housing, land, energy, health care, education, transport, and other services. If the supply of these resources and services does not increase sufficiently, competition and pressure on them can rise. Population growth does not automatically make every resource scarce: technology, conservation, efficient use, and better planning can change the balance. Nevertheless, the basic reason identified in this question is increasing demand from more people. B is not a necessary result of population growth. C is an extreme and unsupported claim. D is also not a necessary consequence; industries may expand or change. Memory cue: more people usually mean more total needs, so compare population growth with resource availability and management.

Answer: A, when the base population is very large. Absolute growth is the actual numerical increase, whereas a growth rate compares that increase with the starting population. The basic relationship is growth rate = (increase ÷ base population) × 100. For example, an increase of 1 million may be large in number, but against a base of 100 million it is only 1%. The same increase against a base of 5 million would represent 20%. B may affect population change, but it does not explain the specific contrast between high absolute growth and a low rate. C is irrelevant to the denominator, and D makes the population-rate comparison meaningless rather than explaining a normal low rate. Memory cue: a large denominator can make a large increase look small in percentage terms.

Answer: A is correct. Natural increase is broadly related to the difference between the birth rate and the death rate. If the death rate is already low and the birth rate keeps falling, the gap between births and deaths becomes smaller. As a result, the rate of natural population increase may decline over time. The word “may” is important because migration and other conditions can also influence total growth. A is correct because it describes a reasonable long-term tendency. B is wrong because a falling birth rate does not support an always rapidly rising growth rate. C is wrong because a lower growth rate does not mean instant disappearance. D is wrong because migration keeps its meaning: movement of people from one place to another. Memory cue: lower births minus low deaths usually means slower natural increase.

Answer: A is correct. The total population tells us how many people live in a place at a particular time, but it does not fully explain why that number changes. To understand growth, we also examine births, deaths and migration. Age structure is useful because a place with many young people may have more future births, while an ageing population may have fewer births. A is correct because it includes both the result—the total number—and important processes behind change. B is wrong because a total can be accurately measured even though it is incomplete by itself. C is wrong because population is a major geographical subject connected with place and space. D is wrong because population numbers can be shown in tables, maps and graphs. Memory cue: number is the result; processes explain the reason.

Answer: A is correct. A young population has a relatively large share of children and adolescents. As these people grow older, many may enter the reproductive age groups. If births per family and other conditions permit, the number of births can remain high for some time. This creates population momentum: growth can continue because a large group is moving into child-bearing ages, even if fertility is beginning to fall. A is correct because it links age structure with possible future births. B is wrong because a young population is not an ageing population. C is wrong because a young population does not imply a zero birth rate. D is wrong because migration may continue independently of age structure. Memory cue: a large young base can create future growth momentum.

Answer: A is correct. Natural increase depends mainly on the relationship between births and deaths. In an ageing population, older age groups form a larger share of the total population, while the proportion of people in child-bearing ages may be smaller. This can lead to a lower birth rate and therefore a smaller natural increase. Deaths may also be relatively numerous because the population contains more older people, although the exact result depends on health and other conditions. A is correct because it identifies the likely age-structure reason. B is wrong because deaths do occur in every population. C is wrong because outside arrivals describe in-migration, not ageing itself. D is wrong because land area does not automatically increase natural population growth. Memory cue: an older age structure usually means fewer potential parents.

Answer: A is correct. A positive population growth rate means that the population is still increasing. If the rate falls from, for example, a higher positive value to a lower positive value, the population continues to grow, but more slowly than before. This is the difference between a declining growth rate and a declining population. B is wrong because a negative rate generally means the population is decreasing, assuming the measure includes the relevant components. C is wrong because zero births and deaths would not by themselves describe all possible population change, since migration may occur, and they do not explain the stated situation. D is wrong because stopping the count does not stop real population change. Memory cue: positive but smaller means slower growth, not immediate decline.

Answer: A is correct. Social factors shape people’s choices, opportunities and family-related behaviour. Education, especially for girls and women, can affect knowledge of health and family planning. Social attitudes may influence the age at marriage and whether families prefer smaller or larger family sizes. These factors can therefore influence fertility and, over time, population growth. A is correct because it identifies real social links with birth patterns. B is wrong because Earth’s axis is a physical astronomical matter, not a direct result of social behaviour. C is wrong because sea level is affected by physical and climatic processes, not immediately by social customs. D is wrong because a census is a method of counting and describing population, not weather changed by society. Memory cue: social conditions influence decisions about marriage, education and family size.

Answer: A is correct. Higher female education can expand knowledge, employment opportunities, decision-making power and access to information about health and family planning. In many situations, these changes are associated with later marriage, better spacing of births and a preference for smaller families. These effects can contribute to a lower birth rate over the long term, although education does not produce exactly the same result in every place. A is correct because it states a possible long-term effect rather than an absolute rule. B is wrong because education does not always make the death rate rise. C is wrong because migration can still occur among educated people. D is wrong because education does not stop population counting. Memory cue: more education and choice can support later, fewer or better-spaced births.

Correct answer: A. A death rate measures the number of deaths in a population during a given period. In a developing country, death rates can fall quickly when basic living conditions improve. Better hospitals, medicines, clean drinking water, sanitation, vaccination, maternal care and food supply help more people survive diseases and childhood illnesses. Improved nutrition also strengthens the body and reduces the risk of severe illness. This change affects deaths, not births directly. B is wrong because a fall in death rate does not require the birth rate to become zero; births and deaths are separate demographic processes. C is wrong because migration changes where people live, but ending migration does not itself prevent disease or death. D is wrong because the physical area of a country has no direct power to reduce mortality. Memory cue: improved health conditions usually mean fewer deaths.

Correct answer: A. New industries can create jobs and increase demand for workers, services and housing. People from nearby or distant places may move into the district to seek employment or better income. This movement into a place is called in-migration, and it can increase the district’s population even without a change in its birth rate. It is called a non-natural or migration-related component because the increase comes from people changing location rather than being born there. B is wrong because industries do not make births immediately zero. C is wrong because no economic activity can guarantee that deaths will end completely. D is wrong because the opening of factories does not enlarge the physical boundaries of the district. The effect also depends on the number of jobs, wages, housing and public services available; migration may be temporary or permanent. Memory cue: industry brings jobs, jobs attract workers, and workers may migrate in.

The correct answer is A: population growth means a change in the number of people living in a place, and it is explained by births, deaths and migration together. Begin with the basic idea: births add people, while deaths reduce the number of people. In-migration, or people entering an area, also increases its population; out-migration, or people leaving, decreases it. Thus, population change can be understood as births minus deaths, with migration also included when we study total change. A is correct because it includes all three processes. B is wrong because an increase in land area does not automatically add people. C is wrong because weather may influence living conditions but is not the definition of population growth. D is wrong because language distribution describes culture, not the numerical change in population. Memory cue: births and arrivals add; deaths and departures subtract.

The correct answer is A. Total population tells us the actual number of people, whereas the growth rate tells us the speed or percentage at which that number changes. Consider a simple comparison: a small population growing at a high percentage may add fewer people than a very large population growing at a low percentage. For example, 10% of 100 is 10, while 1% of 10,000 is 100. Therefore, planners must consider both the rate and the total number. A is correct because a low rate applied to a large population can create a large numerical increase and substantial needs for food, housing, schools and health services. B is wrong because percentage rate and actual number are different measures. C is wrong because total population is essential for planning. D is wrong because population growth rate concerns human populations, not rivers. Memory cue: rate shows speed; total population shows scale.