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In which situation can a decline in the death rate speed up population growth?

Answer and explanation

Correct answer: When the birth rate is still fairly high.

Answer: A. Natural population increase depends mainly on the balance between births and deaths: when births are greater than deaths, the population can grow. If the death rate falls while the birth rate remains fairly high, the gap between births and deaths becomes larger, so natural increase can rise. A is correct because it supplies the necessary condition for a fall in deaths to produce faster growth. B is incorrect because a zero birth rate cannot produce natural increase, even if deaths fall. C describes out-migration, which can reduce the population rather than create natural increase. D leaves no people among whom births or deaths can be counted. This does not mean every fall in death rate always causes growth; the birth rate and migration also matter. Memory cue: natural increase = births minus deaths; then consider migration separately.

Related tags

Death RateBirth RateNatural IncreasePopulation GrowthProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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