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If a country's fertility rate falls to replacement level but its population continues to grow for several decades, which age-structure feature best explains this?

Answer and explanation

Correct answer: Large young cohorts entering reproductive ages

This pattern is called population momentum. If earlier high fertility produced large young cohorts, many people may enter reproductive ages at around the same time. Even at replacement-level fertility, the large number of potential parents can result in more births than deaths for a period, so population growth may continue. Option A identifies the age-structure feature behind this momentum.

Related tags

Population MomentumReplacement FertilityAge StructurePopulation CompositionGeographyClass 12 Mcq

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