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Which situation best explains population momentum?

Answer and explanation

Correct answer: Population keeps growing for some time due to a large young population even after the birth rate falls

The correct answer is A. Population momentum means that population may continue to grow even after fertility or birth rates begin to fall. The reason is age structure: when a country has a very large number of young people entering or already in reproductive ages, many births can occur in total, even if each woman has fewer children on average. Option A correctly connects a falling birth rate with a large young population and continuing growth. Option B is wrong because a rising death rate does not instantly make a population zero. Option C confuses land area with birth behaviour; area alone does not determine birth rate. Option D is unrelated because migration need not become zero. Memory cue: rate can fall while the large age group keeps the total number of births high.

Related tags

Population MomentumAge StructureBirth RatePopulation GrowthPopulationGeographyClass 9 Mcq

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