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If the total population is rising but the number of children per family is declining, which reason is possible?

Answer and explanation

Correct answer: The population base is large and the death rate is low

The direct answer is A: the population base is large and the death rate is low. Fewer children per family usually indicates declining fertility, but the total population can still rise for some time. A large existing population contains many people in or approaching childbearing ages, so even a smaller average family size may produce many births in absolute numbers. If deaths are also fewer because health conditions improve, births can remain greater than deaths. This continuing increase is often called population momentum; migration may also contribute, although it is not needed for the answer. Option B is too absolute and is not required: family size can fall even when the total population rises. Option C is impossible because a population requires surviving people. Option D is irrelevant and falsely says migration cannot occur. Memory cue: family size is a rate or average, while total population is the accumulated number of people.

Related tags

Family SizePopulation MomentumMortalityPopulation GrowthPopulationGeographyClass 9 Mcq

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