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Fertility behavior has declined in a country, yet the school-age population remains large for several years. What is the main reason?

Answer and explanation

Correct answer: Large cohorts born earlier are still passing through school ages

Population structure changes gradually because people born in earlier years continue to move through the age groups. A fall in fertility affects the number of young children first, but it does not immediately remove a large group that was already born. If that earlier group is large, many of its members may remain in school ages for several years.

Therefore, option A is correct: large cohorts born earlier are still passing through school ages. This is called a time-lag effect in age structure. School systems may continue to face high demand even after fertility declines. The other choices are not valid explanations: schools do not necessarily raise birth rates, death rates are not zero, and migration does not always increase the number of children.

Related tags

Fertility DeclineSchool Age PopulationAge CohortsDemographic LagPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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