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If total population is growing while the 15 to 64 age group is continuously declining, which explanation is most likely?

Answer and explanation

Correct answer: Elderly population is rising while working-age adults leave or smaller cohorts enter

Total population is made up of several age groups, so it can rise even when one group becomes smaller. An ageing population may contain more elderly people, while the working-age group may shrink because adults migrate out or because fewer young people are entering it. The important idea is that total growth does not require every age group to grow.

Option A is correct because it combines these two possible demographic changes: a rising elderly population and a declining working-age population. A large older cohort can increase total numbers through longer survival, while emigration or smaller birth cohorts reduce the working-age supply. Options B and C contradict the stated decline, and D would not explain population growth. The exact contribution of migration and births would require data, but A is the most plausible explanation.

Related tags

Working Age DeclineTotal Population GrowthAge StructureCohort ChangePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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