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In which situation will the effect of a birth rate reducing policy not appear immediately?

Answer and explanation

Correct answer: When the young reproductive-age group is large

The direct answer is A: the effect may be delayed when the young reproductive-age population is large. A birth-rate-reducing policy can lower the average number of children per woman, but a large number of people are still entering or already in the childbearing ages. Step by step, many couples in this large age group may have children; therefore, the total number of births can remain high for some time even after fertility begins to fall. This delayed effect is called population momentum. A is correct because a large young age group continues to add potential parents. B is wrong because having no children would not describe the usual source of delayed population growth. C is wrong because if births were already zero, there would be no continuing birth effect to delay. D is wrong because mass out-migration is a different process and is not the demographic reason asked here. Memory cue: a young population can keep population growth moving forward like a heavy wheel even after policy slows it.

Related tags

Population MomentumBirth Rate PolicyReproductive AgeProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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