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Under which condition can population continue growing for some time because of demographic momentum even when fertility is declining?

Answer and explanation

Correct answer: When a very large number of people are in reproductive ages

Demographic momentum occurs when a population has a large number of young people because of high fertility in the past. As this large group reaches reproductive ages, it can produce many births even if each woman has fewer children than earlier generations. The number of potential parents remains high, so total births may continue to exceed deaths for some time. Population growth can therefore persist after fertility begins to decline.

Option A is correct because a large reproductive-age population is the essential condition described. Equal age groups do not create the same momentum, and stopping births would end natural increase rather than continue it. A population with no young people would generally have weaker momentum. The effect is temporary and eventually weakens as smaller birth cohorts replace the large earlier cohorts.

Related tags

Demographic MomentumAge StructureFertility DeclinePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And GrowthGeography

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