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If a country's birth rate falls very rapidly while large young cohorts already exist, which age-structural outcome is most likely over the next 15 years?

Answer and explanation

Correct answer: The child share will decline while large young cohorts enter working ages

Age structure changes as existing cohorts grow older and move into the next age groups. A rapid fall in birth rate produces smaller new child cohorts, so the share of children generally declines. However, a large group that is already young does not disappear; during the next 15 years many of them enter adolescence and working ages.

Therefore option B is correct: the child share falls while large young cohorts move into the working-age population. The elderly do not immediately disappear, and age groups do not suddenly become equal. Option A reverses the likely effect of falling births. The exact outcome also depends on mortality and migration, but among the choices B is the best supported conclusion.

Related tags

Fertility DeclineCohort AgeingWorking Age PopulationDemographic DividendAge StructurePopulation CompositionGeographyClass 12 Mcq

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