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If birth rate is declining but young population is very large why can growth continue?

Answer and explanation

Correct answer: Because of population momentum

Direct answer: A, population momentum. Population momentum means that a population can continue to grow for some time even after the birth rate begins to fall. The reason is the age structure: when a very large group is young, many people will soon enter the childbearing ages. Even if each family has fewer children than before, the large number of potential parents can produce many births in total. This is a delayed effect, not an immediate reversal of population size. A is correct because it names this age-structure mechanism. B is wrong because an infinite death rate would not explain continuing growth and is not a realistic demographic condition. C is wrong because migration is not required for momentum; momentum can result from births within the population. D is wrong because a reduction in area changes density, not the biological reason for continued growth. Memory cue: a large young base means many future parents, so growth may continue before slowing.

Related tags

Population MomentumYoung PopulationBirth RateAge StructurePopulation GrowthPopulationGeographyClass 9 Mcq

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