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In which situation can the effect of a declining death rate appear as population ageing?

Answer and explanation

Correct answer: When people begin to live to older ages

Correct answer: A. A decline in the death rate, especially when people survive to older ages, can increase the number and proportion of elderly people. Population ageing means that older age groups form a larger share of the total population. Better survival does not mean that every person becomes old at the same time; rather, more people reach advanced ages and remain alive for longer. B may change the local age composition through migration, but it is not the direct meaning of a declining death rate. C usually keeps the younger share large and therefore does not explain ageing. D is irrelevant because ageing can result from survival patterns even when migration has little or no effect. Remember that ageing is about the proportion of older people, not merely the total population. Memory cue: lower mortality plus longer survival can raise the elderly share.

Related tags

Declining MortalityPopulation AgeingLife ExpectancyProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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