Age Structure

Correct answer: B. Child population

Age structure divides a population into broad age groups. People from 0 to 14 years are generally classified as children. They are usually still growing, studying, and receiving care from families or institutions. Their participation in regular paid work is normally limited, so they are commonly counted among the dependent population rather than the working-age population.

The elderly group refers to older people, while the working-age group usually covers adults capable of participating in economic activity, although exact limits can differ by statistical system. “Retired population” is not a standard age-structure category because retirement depends on occupation and policy. Therefore, option B, child population, is the correct choice.

Correct answer: C. Working-age group

The 15–59 years age group is generally called the working-age population. People in this broad range are more likely to be physically and socially able to work, earn income, produce goods and services, and support dependants. This classification is a statistical and demographic generalisation; it does not mean that every person in this age group is employed or able to work.

Option C follows directly from the usual age-structure classification. Children are normally treated as young dependants, and older people are usually placed in the elderly-dependent group. The phrase “only student group” is too narrow because people aged 15–59 may be workers, students, caregivers, or unemployed. Thus, working-age group is the accurate answer.

Correct answer: D. Elderly population

Age structure classifies people into broad age groups so that the population’s social and economic needs can be understood. People aged 60 years and above are generally placed in the elderly or older-person category in demographic descriptions. This classification is based on age, not on whether a person is still healthy, employed, or independent.

Therefore, option D is correct. Some people over 60 may continue working, so “elderly” does not mean that every person has stopped working. The child and adolescent categories refer to younger ages, while the working-age category normally covers the main economically active ages and does not specifically describe everyone aged 60 or above. The exact age limits can vary by statistical system, but 60-plus is commonly treated as an older population group.

Correct answer: B. It helps estimate economic and social needs

Age structure describes how a population is divided among children, working-age adults, and older people. These groups usually have different needs and different relationships with employment and dependency. A country with many children may need more schools, teachers, vaccination, and child health services. A country with a large working-age group needs jobs, training, transport, and housing. A country with many older people may need pensions, medical care, and support services.

Because of this, age structure helps governments estimate both present and future economic and social requirements. It also helps planners understand the dependency burden and prepare budgets and policies. Therefore option B is correct. Rainfall, geographical boundaries, and soil types are studied through other geographical methods; age structure does not directly measure any of them. Its practical value lies in population planning and resource allocation.

Correct answer: A. Young age structure

Age structure describes how a population is distributed among different age groups. When children and young people form a large share of the total population, the population is called youthful or is said to have a young age structure. This pattern often results from a relatively high birth rate, because many new members are being added to the youngest groups. It may also create future population growth as these large child cohorts reach reproductive and working ages.

The correct choice is therefore young age structure. An ageing structure is the opposite pattern, in which elderly people form a growing or large share. A stable elderly structure is not a standard description of a population with many children, and a population cannot be classified as migrant-only merely from its age distribution. The important clue is the unusually high proportion of children, which directly points to option A.

Correct answer: B. Population ageing

When the proportion of elderly people increases steadily, the population is undergoing population ageing. This means that older age groups are becoming a larger share of the total population. The change may occur because people live longer due to improved health care and living conditions, because fewer children are being born, or because younger people migrate away. Population ageing is therefore a change in the age composition, not simply a change in total population size.

The correct answer is population ageing. A larger elderly share does not indicate expansion of the child population or high infant births. Urbanization may influence age patterns, but it is not the name of this demographic process and cannot by itself explain the observation. To identify ageing, we focus on the rising proportion of older people over time. Thus option B follows directly from the information given.

Correct answer: C. Children and elderly people

Dependent population refers mainly to people who are less likely to support themselves through regular work and may rely economically on the working-age population. The two principal groups are children and elderly people. Children generally depend on adults for food, education, health care, and daily care. Many elderly people may depend on families, pensions, or public support after leaving the labour force. The exact age limits can differ between statistical systems, but the basic idea remains the same.

The working-age group is often represented by ages such as 15–59 or 15–64, depending on the country and source, so it is not the dependent population itself. Ages 20–40 cover only part of working age and cannot define all dependants. Employment status alone also does not determine the age groups included. Since the question asks for the main age groups, children and elderly people are the appropriate answer: option C.

Correct answer: A. Increase in productive labour force

A high proportion of working-age people can give a country a large potential labour force. If these people receive good education, useful skills, health support, and suitable jobs, they can increase production, household income, savings, tax revenue, and economic growth. This possible benefit is often associated with a demographic dividend, but it is not automatic; good policies and opportunities are necessary.

Option A is correct because more working-age people can enlarge the productive workforce. The other choices are not logical consequences. Schools remain necessary, elderly people do not disappear merely because workers are numerous, and birth rates do not automatically become zero. Therefore, the clearest potential advantage is an increase in productive labour, provided the country can use this population effectively.

Correct answer: B. Schools and child health services

Age structure shows how many people belong to different age groups. If children make up a large percentage of the population, many families need services that support growth, learning, and healthy development. The main requirements include schools, teachers, textbooks, vaccination, nutrition programmes, child health centres, and primary medical care. Planning these services becomes especially important when the child population is large.

Pension services are mainly associated with older people, while old-age homes serve only a small part of the elderly population. Ports are transport facilities and are not directly determined by the share of children. Thus, the age structure gives a clear reason to expect greater demand for schools and child health services. Therefore, option B is correct.

Correct answer: C. Health care and pensions

When elderly people make up a large share of the population, public services must respond to their particular needs. Older adults may require regular medical check-ups, treatment for chronic conditions, medicines, rehabilitation, long-term care, and support for daily activities. Many may also need pensions or other forms of social security after leaving the labour force. These needs can require sustained public spending and trained care workers.

Primary schools, playgrounds, and infant vaccination mainly serve younger age groups. They remain important in any society, but they are not the needs most directly increased by a high elderly proportion. Therefore, health care and pensions are the most suitable answer. Option C links the age structure to the two major public responsibilities associated with population ageing.

Correct answer: B. Population composition

Age structure describes how a population is divided among different age groups, such as children, working-age adults, and older people. It is not an isolated physical feature of the earth; it is a demographic characteristic. The broader study of demographic characteristics also includes sex composition, literacy, occupation, residence, and other social or economic features. Together, these features help explain the composition of a population.

Thus, option B is correct because age structure is a major part of population composition. Climatology studies climate, geomorphology studies landforms, and soil science studies soils. None of these subjects primarily classifies people by age. Examining the proportions of young, working-age, and elderly people can help us understand dependency, labour supply, social needs, and possible population change. These are all questions within population geography and population composition.

Correct answer: B. 15 to 59 years

Age structure divides a population into age groups and helps show how many people are likely to work, depend on others, or need special support. The 15–59 group is commonly used in Indian demographic descriptions as the working-age or economically active group. Many people in this range can be employed, produce goods and services, earn income, and support children or older persons.

Children aged 0–14 are generally dependants because most are still growing and receiving education. People aged 60 and above may also be dependants because retirement, illness, or reduced work capacity can limit earnings, although some continue working. The question asks for the group most likely to be economically active, so option B is the best answer.

Correct answer: A. Employment opportunities

A youthful population contains a relatively large number of children and adolescents. As these groups grow up, they will need education, training, housing, health care, and especially opportunities to earn a living. The most urgent future requirement is usually employment, because a large number of young people will enter the working-age population together. Without enough jobs, unemployment and social pressure may increase.

Option A is correct because employment opportunities must expand as young people become adults. Skill training and higher education are also important, but they are not listed as the main answer. Old-age pensions, geriatric hospitals, and funeral services may be needed in every society, yet they do not represent the most immediate consequence of a youthful age structure. Thus, employment is the best choice.

Correct answer: C. 60 years and above

An ageing population is one in which older persons make up a relatively large share of the total population. In the school-level classification used here, the group aged 60 years and above represents the elderly population. A larger share of this group usually results from longer life expectancy, lower fertility, or both. It is the proportion of age groups, rather than merely the total number of people, that identifies an ageing population.

Therefore, option C is correct: 60 years and above has a relatively high proportion. The groups from 0 to 5 years and 0 to 14 years are child groups; their high share would instead suggest a young population. The 15-to-19 group is only a narrow adolescent interval and cannot represent the whole elderly population. Age thresholds may vary slightly across statistical systems, but within the categories given, 60 years and above is clearly the appropriate choice.

Correct answer: A. Potential demographic advantage

When the working-age share is large and the shares of children and elderly people are relatively small, fewer dependants have to be supported by each working person. This situation can create a demographic dividend or potential demographic advantage. More adults may be available for employment, production, saving, taxation, and investment in development.

However, the advantage is only potential, not automatic. It becomes useful when the country provides education, skills, healthcare, productive jobs, gender equality, and suitable economic policies. Without these conditions, a large working-age group may face unemployment or insecure work. Still, among the given choices, option A is correct because the described age structure can indicate a potential demographic advantage.

Correct answer: A. Working-age population

Dependent age groups usually include children and older people who are less likely to earn regular income. They still need food, housing, education, health care, protection, and sometimes pensions or daily assistance. When their share becomes large, fewer working-age people may have to support more dependents through household income, taxation, public services, or care work. This can raise the dependency burden on workers and governments.

The pressure is not placed on ocean currents, mineral reserves, or rainfall systems, because those are physical or environmental features rather than providers of support. The exact burden depends on employment, productivity, family arrangements, and public policy, but the main population relationship remains clear. Thus option A, the working-age population, is the correct choice.

Correct answer: A. Population pyramid

A population pyramid is a graph that presents the age and sex composition of a population. Age groups are usually arranged from younger ages at the bottom to older ages at the top. The two sides commonly represent males and females, allowing the viewer to compare their numbers in each age group. The overall shape can show whether a population is youthful, stable, or ageing.

A broad base generally suggests many children and relatively high fertility, while a narrower base may indicate lower fertility. A wider upper part can reflect a larger elderly population and longer survival. Thus option A is correct because the population pyramid is specifically designed to display age structure, often together with sex structure. A rainfall map shows precipitation, a soil profile shows soil layers, and an ocean map represents marine features; none is the standard graph for age distribution.

Correct answer: B. Low birth rate

A population pyramid shows the distribution of people by age and sex. Its base represents the youngest age groups. When the base is relatively narrow, children make up a smaller share of the total population. One common reason is a low birth rate, especially when fertility has remained low for several years. A narrow base may therefore suggest smaller younger cohorts and possible future population ageing.

The correct choice is B. A very high birth rate would usually create a broad, not narrow, base because many children would be present. A large child population also produces a broad base. High migration can affect particular age groups and the shape of a pyramid, but “only high migration” is too definite and is not the standard explanation for a narrow base. The most direct association is low fertility or low birth rate.

Correct answer: A. Youthful age structure

A youthful age structure has a large proportion of children and adolescents. These young people need access to primary and secondary education, classrooms, teachers, textbooks, transport, nutrition, and health services. The larger their share, the greater the immediate and future demand for schools. Such a population may later provide a large workforce, but it first creates substantial needs for child-related services.

Option A is correct because it directly describes this age pattern. An ageing structure contains a larger share of older people and is more closely associated with pensions and health-care needs. A working-age-only structure is not a normal complete population pattern, and a zero-population structure is impossible in this context. School demand depends especially on the size of the school-age population, which is relatively high in a youthful structure.

Correct answer: B. Ageing population

Pension systems transfer resources to people who have stopped working or have limited earning capacity. When the share of older people rises, more individuals may receive pensions for longer periods, while the relative number of workers contributing taxes or contributions may become smaller. This can place greater financial and administrative pressure on pension systems.

An ageing population therefore usually creates more demand for pensions, elderly care, health services, and social support. A youthful population may require major investment in schools and child health, but it does not normally place the greatest immediate pressure on pensions. A high-birth population is not necessarily an ageing population, and a child-only population cannot explain high pension spending. Hence B is correct. The exact pressure also depends on retirement ages, pension design, employment, and government finances.

Correct answer: B. Dependent population

Age structure classifies people by age and helps show how many are likely to work and how many may need support. Children are generally not yet in the labour force, while many older people have retired or have limited earning capacity. For this reason, both groups are commonly placed in the dependent population category, although actual dependence varies among individuals and societies.

Option B is correct because dependent population is the broad demographic category for people who are usually outside the working-age group. Working population refers mainly to people in economically active ages, not to children and the elderly together. Industrial and migrant population describe occupations or movement rather than an age-based dependency category. Thus B follows from the purpose of age classification and the usual relationship between age and economic support.

Correct answer: A. Employment and skill development

A rapidly expanding working-age population can become a strong economic resource, but only when people are prepared and able to find productive work. The government therefore needs to improve schools, vocational and technical training, employment services, industries, infrastructure, and support for entrepreneurship. These measures help convert a large potential workforce into higher production and incomes.

Option A is correct because employment and skill development address the two central requirements of a growing workforce. Building only old-age homes or infant hospitals does not respond to the main demographic pressure described here. Reducing agricultural land is not a suitable population policy. The opportunity can be lost if young workers remain untrained or unemployed, so active public planning is essential.

Correct answer: A. Size of the labour force

Age structure shows how many people belong to different age groups, such as children, working-age adults, and older people. This information helps planners estimate how many young people may enter employment in the future and how many current workers may later need pensions or health support. It can therefore guide decisions about schools, training, jobs, social security, and health services.

A large child group may indicate a future expansion of the labour force, although migration, mortality, education, and employment conditions can change the final result. Age structure cannot directly estimate the height of mountains, the direction of rivers, or the colour of soil. Thus option A is the relevant conclusion: it helps estimate the future size and composition of the labour force.

Correct answer: A. Large child population

The age group from 0 to 14 years represents children in most demographic classifications. If this group forms a high proportion of the total population, the country has a large child population and a youthful age structure. Such a pattern may reflect high birth rates in recent years, although migration and mortality can also influence the exact share. A large child group may create future demand for schools, health services, and later employment.

The evidence does not indicate a large elderly population, because elderly people belong to older age groups. It also does not prove high migration by itself, and it is inconsistent with the usual meaning of very low births, which tends to produce a smaller child share. The direct interpretation of a high 0–14 proportion is therefore a large child population. Hence option A is the most appropriate answer.

Correct answer: B. The population is ageing

A rising share of people aged 60 years and above means that older people make up an increasing part of the total population. This is called population ageing. It is a statement about the age composition, not automatically about one particular cause. Ageing may be associated with lower fertility, longer life expectancy, improved health care, or migration patterns that change the relative size of age groups.

Therefore, option B is the appropriate conclusion: the population is ageing. The information does not prove that the birth rate is rising; in many ageing populations, fertility is low. It also does not show that the child population is increasing or that the population is becoming younger. The conclusion follows directly from the increasing proportion of older persons.