Demographic Transition Theory

The important clue is that the birth rate remains high while the death rate has fallen sharply. Ten years earlier, natural increase was \(38-28=10\) per thousand. Now it is \(38-12=26\) per thousand. Thus, the gap between births and deaths has become much wider because mortality declined while fertility stayed high. This is the characteristic pattern of the second stage of demographic transition.

Option B is therefore correct. The first stage would have both high birth and high death rates with little growth, not a sharp fall in mortality. The third stage would normally show a clearly declining birth rate as well as low mortality. Natural decline would require deaths to exceed births, which is not the case here. The figures indicate rapid population growth, not stability or decline.

A rapidly falling infant mortality rate means that more children survive than before. A large average family size indicates that fertility is still high, while a broad base in the population pyramid shows that children form a large share of the population. These indicators reinforce one another: mortality is declining, fertility remains high, and the young population is expanding. This is the typical pattern of the second stage of demographic transition.

The first stage has both high birth and high death rates, whereas the third stage has low fertility and a narrower pyramid base. Natural decline would require deaths to exceed births, which is not suggested here. Therefore, the combined evidence supports rapid growth of the young population in the second stage. Option B is correct.

Natural increase is found by subtracting the death rate from the birth rate. Initially it was \(28-8=20\) per thousand. After the birth rate fell to 20 per thousand, natural increase became \(20-8=12\) per thousand. Therefore, population growth slowed, although it remained positive. Since the death rate is already low, the important change is the decline in fertility. Such a movement is consistent with a country progressing toward the third stage, in which both rates are relatively low and growth becomes slower.

The correct choice is B. Choice A reverses the calculation and incorrectly says growth increased. The country is not returning to the first stage, because that stage is marked by high mortality as well as high fertility. The information also does not show that mortality transition has just begun; mortality is already low. The precise conclusion combines the numerical fall in natural increase with movement toward the third stage.

Education, urbanization, and female employment usually encourage smaller families, but their effect may be weakened when infant mortality remains high. If parents are unsure that every child will survive, they may choose to have more births as a form of security. In that situation, the desired number of births can remain high even while social modernization is advancing.

The key point is that fertility decisions depend not only on education or employment but also on confidence in child survival and access to effective health care. Therefore, choice A is correct. Urbanization does not always raise fertility, female employment does not cause mortality, and infant mortality can clearly influence family-size decisions.

The number of births in a year depends on both the birth rate and the number of people who are in the reproductive-age group. A declining birth rate means that the average fertility is falling, but it does not necessarily produce an immediate fall in the total number of births. If a country has a very large group of adults entering or already in reproductive ages, their numbers may keep total births nearly stable for several years. This effect is often connected with population momentum.

Thus, option A is the most appropriate explanation: the reproductive-age population is very large. Options B and C confuse causes and measures, while option D describes no normal demographic process. Even when each woman has fewer children on average, a large number of potential parents can offset that decline temporarily. Over a longer period, if the lower fertility continues and the reproductive-age population becomes smaller, total births are more likely to decrease.

The natural population change is calculated from births minus deaths: \(9-11=-2\) per thousand. Thus, the country has a natural decrease of 2 per thousand because deaths exceed births. This measure does not include migration. Net in-migration is added separately, so a very large inflow can make the total population rise even when natural change is negative.

Demographic-transition analysis mainly examines the pattern and levels of fertility and mortality, whereas total population change also includes migration. Therefore, choice A correctly separates these ideas. Choice C is too simplistic: deaths exceeding births alone do not identify the first stage, and choice D ignores migration. The exact stage would require broader fertility and mortality information.

When fertility declines, fewer children are dependent on adults. At the same time, people born during an earlier period of high fertility may enter working age, so the share of the population able to work increases. This combination can create a demographic dividend: a possible economic advantage produced by a favourable age structure.

A dividend is not automatic. It becomes useful only when the country can provide education, skills, health, productive jobs, equal opportunities, and suitable policies. If these conditions are present, more workers can support fewer dependants, save more, and increase production. Choice A is therefore correct. The other choices describe outcomes inconsistent with falling fertility and a rising working-age share.

A demographic dividend is not created simply by having many people in the working-age group. It becomes an economic advantage when those people can find productive employment and have suitable education, health, and skills. If the number of jobs grows slowly, many working-age people may remain unemployed or work fewer hours than they would like. Their potential contribution to production, savings, and public revenue is then not fully used.

Option A correctly describes this problem. A large working-age population does not always raise mortality, and fertility does not automatically become zero when the working-age share increases. The labor force mainly refers to people available for work, not only elderly people. Therefore, slow job creation can turn a possible demographic opportunity into unemployment, underemployment, and social pressure, weakening the dividend.

The second stage begins when mortality falls but fertility remains high. This creates a large difference between births and deaths for many years. If the pattern continues for fifteen years, many children survive and enter the younger age groups. The population pyramid therefore becomes broad at its base, producing a very large young population.

This structure can create demographic momentum. Even if fertility later starts to decline, the large number of young people reaching reproductive age may keep population growth strong for some time. The natural increase does not end, ageing does not occur immediately, and fertility certainly does not become zero. Therefore, the most important long-term result is a large young population together with future demographic momentum, making option A correct.

A population pyramid shows the sizes of many age groups at one time; it does not show only births in the current year. Therefore, a falling fertility rate may not immediately make the pyramid’s base narrow. Children born during earlier years of high fertility may still be numerous and may continue to form a broad lower section.

The shape changes gradually as each cohort grows older and newer, smaller cohorts enter the base. This is why a country can experience declining fertility while still having a broad base. Fertility is directly related to the number of young children, mortality has not necessarily become zero, and the migration of elderly people does not explain a broad base. Hence, option A is the best explanation.

Natural increase is found by subtracting the death rate from the birth rate. In the first country, \(36-32=4\) per thousand; in the second, \(11-7=4\) per thousand. Thus both have the same natural increase, but their overall demographic situations are not the same. The first country has very high birth and death rates, a pattern associated with the first stage. The second has low birth and death rates, which is associated with a later stage and slow growth.

This shows why the absolute levels of the rates matter, not only the difference between them. Equal natural increase can result from very different combinations of births and deaths. Migration is not the sole determinant of stage, and natural increase does have importance. Birth rate is also a useful indicator when examined with mortality and other demographic conditions. Therefore, option A is correct.

Natural increase is calculated by subtracting the death rate from the birth rate, with both rates expressed per thousand. Initially, it is \(32-8=24\) per thousand. After the birth rate falls to 24 per thousand, natural increase becomes \(24-8=16\) per thousand. The reduction in natural increase is therefore \(24-16=8\) per thousand. Equivalently, because the death rate stayed unchanged, the decline in natural increase is exactly equal to the decline in the birth rate: \(32-24=8\) per thousand.

Option A is correct. The question asks for the reduction in natural increase, not the new natural-increase rate. The new rate is 16 per thousand, but the amount of decline is 8 per thousand. Option B incorrectly doubles the change, option C gives the later natural-increase rate rather than the reduction, and option D uses the wrong difference. Thus, A follows directly from the calculation.

A national demographic stage should be understood from the overall country pattern, but national averages must not hide strong regional contrasts. A low national mortality rate and a single average fertility figure may describe the country broadly, yet different regions can be at different points of transition. One region may still have high fertility and rapid growth, while another may have low fertility and slow or negative growth. Examining both the national average and regional pattern gives a more reliable interpretation.

Option A is correct because it combines the country-level picture with internal variation. Option B is too narrow: the highest-fertility region cannot represent the whole country. Option C is inadequate because the capital may have unusually low or high fertility and is not necessarily typical. Option D is also wrong because mortality remains an important part of demographic transition, even when it is low. Regional data help explain why an average may conceal major social and demographic differences.

Current fertility affects the number of babies born now, but the working-age population is made up largely of people born many years earlier. If a country previously had high fertility, those large birth cohorts will gradually reach working ages even after fertility becomes very low. This creates a time lag between a fertility decline and its effect on the size of the labour force. The working-age population can therefore keep growing for a period.

Option A is correct because it explains this age-structure effect. Low fertility will eventually produce smaller working-age cohorts, but that effect appears only after the smaller cohorts grow up. Option B is wrong because fertility and age structure are connected through past births. Migration can influence the working-age population, but it is not the only source, so C is too absolute. Mortality is not always zero, making D incorrect.

Rising elderly dependency means that the number of older people is increasing relative to the working-age population. Low fertility creates smaller younger cohorts, while high life expectancy allows more people to survive into old age. Together, these changes can increase pressure on pension systems, medical services, long-term care, and public budgets. They can also make the productivity of each working-age person more important.

A suitable response is therefore a policy combination: provide sustainable pensions, accessible elderly health and care services, and improve the skills, health, employment, and productivity of working-age people. Expanding only primary schools does not address the immediate ageing issue. Forcing fertility is neither a reliable nor an appropriate single solution, and reducing health care would worsen the problem. Option A is correct.

Family planning gives people the ability to limit births, but its use does not automatically remove the desire for a large family. Fertility depends not only on access to contraceptives, but also on social values, religion, economic expectations, gender roles, and beliefs about support in old age. If having many children remains respected or useful, couples may continue to prefer larger families.

Therefore, a strong social preference for large families can explain why fertility falls less than expected even when family-planning use rises. Low mortality by itself does not directly explain the continuing preference for more births, and land area or population density does not determine individual reproductive decisions. Thus option A is the best answer.

Rapid population growth occurs when mortality has fallen but fertility remains high. This creates a wide difference between births and deaths. If fertility starts declining soon after mortality falls, that difference does not continue for a long period. Consequently, the phase of rapid increase is shorter, and the total number added over the whole transition may also be smaller than it would have been with prolonged high fertility.

The timing matters more than the mere occurrence of a fertility decline. A short second stage means that the country moves more quickly toward lower growth, because births begin approaching deaths earlier. It does not mean that population must double, since doubling depends on the size and duration of natural increase. Choice A therefore follows directly; the other choices do not describe the effect of a brief second stage.

Natural change is found by comparing births with deaths. If the birth rate falls below the death rate, the number of births is smaller than the number of deaths, so natural change becomes negative. This is called natural decrease. When both rates are low and this pattern continues, each younger generation may be smaller than the preceding one. The share of older people can then rise, producing population ageing.

Option A combines both effects: natural decline and increasing ageing. Rapid natural growth would require births to exceed deaths, so option B is contrary to the condition. High birth and high death rates do not describe the stated situation, and a return to the first stage is also incorrect because the first stage is associated with high rates rather than low rates. Therefore option A is the correct interpretation, assuming the birth rate remains below the death rate for a sustained period.

The total dependency ratio compares dependents with the working-age population. Dependents usually include children and older people, while the working-age group forms the denominator. If fertility falls, the number or proportion of children decreases, so child dependency declines. If elderly dependency has not yet risen, that second component does not offset the fall. Consequently, the total dependency ratio may decline in the initial period.

Option A is correct because the word “may” allows for the combined effect of both groups. The ratio is not forced to rise, and elderly dependency cannot automatically double merely because child dependency falls. The effect is possible even though later population ageing may increase old-age dependency. This temporary decline can create a demographic-dividend opportunity, provided the growing working-age population is healthy, educated, and productively employed.

A decline in fertility changes the age structure gradually. The number of young children may grow more slowly, so the immediate need to build more primary schools can weaken. At the same time, people born in earlier, larger cohorts may be entering working age. This creates a stronger need for productive employment and suitable preparation for work.

Therefore, government priorities may move from simply expanding school capacity toward skills, higher education, vocational preparation, and job creation, making option A correct. This does not mean basic education should be closed. Infant vaccination remains important, but it is not the main structural shift described. Elderly pensions may become more important later, but the question emphasizes the growing working-age population.

Natural increase is calculated by subtracting the death rate from the birth rate, with both rates expressed per thousand people. At the beginning, the calculation is \(30-10=20\) per thousand. Five years later, the calculation is \(22-9=13\) per thousand. Thus, the natural increase falls from 20 to 13 per thousand.

The reason is that the birth rate decreases by 8 per thousand, from 30 to 22, while the death rate decreases by only 1 per thousand, from 10 to 9. Although mortality improves slightly, the much larger fall in births reduces the gap between births and deaths. This means population growth is slowing, not that the population must immediately decline. Therefore, option A gives both correct values and the correct trend.

Low fertility and higher spending on each child show a change in family priorities. When children are numerous, household resources may be spread across many dependants. As fertility falls, families can devote more money, time, and attention to the education, health, nutrition, skills, and future opportunities of each child. This is often described as a movement from quantity to quality: the aim is not simply to have more children, but to improve the capabilities and well-being of each one.

Therefore, option A is correct. A large family does not become more economically valuable merely because educational spending per child rises. The evidence does not indicate a return to the first stage of demographic transition, where birth and death rates are both high. It also gives no basis for concluding that infant mortality is high. The combination of low fertility and higher child investment clearly reflects the quantity-to-quality shift.

When a government encourages families to have more children, it usually means births have fallen to a very low level. If this continues, the number of young people entering the workforce may become smaller, while the share of older people increases because people are living longer. The country may then face population ageing, a shrinking working-age population, labour shortages, and greater pressure on pensions and health services. Incentives are intended to reduce the future effects of very low fertility.

Option A is correct because very low fertility can lead to an ageing population and possible long-term population decline. High infant mortality is a different problem and would call for health and survival measures, not primarily birth incentives. High mortality in the first stage does not fit a country offering incentives for more births, and a population explosion results from high fertility, not very low fertility. Therefore, the policy points to low fertility and ageing concerns.

Fertility decisions are shaped by habits, expectations, family norms, and memories of past conditions, so they do not change immediately when infant mortality falls. If parents have long believed that some children may die, they may continue to aim for a larger family even after health services improve. They may also need time to observe that child survival has improved reliably and to gain access to trusted contraception or new information.

Therefore option A is correct: reproductive behavior takes time to adjust. Mortality does not mechanically determine fertility, and child survival can influence desired family size without being the only influence. Weather alone cannot explain a sustained fertility pattern. The key idea is a time lag between an improvement in survival and the social acceptance of a smaller target family.

Low fertility does not always produce an immediate fall in the total number of births. The number of births depends on both fertility and the number of women and couples in the reproductive-age groups. If a country has a very large young population created by earlier high fertility, many people may enter reproductive ages at the same time.

That large age structure can keep the total number of births high even when each person has fewer children. This continuing growth caused by the population’s existing age composition is called demographic momentum. High mortality would reduce growth, returning to the first stage is not required, and fertility remains important. Therefore, option A is the appropriate explanation within the theory.