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If elderly population is increasing in a region, which process of population change may be a cause?

Answer and explanation

Correct answer: Decline in death rate and increase in longevity

Answer: C. An ageing population means that the proportion or number of older people is increasing. When death rates decline and people live longer, more people survive into old age, so the elderly share can rise. This process may occur together with falling fertility, because fewer children are being added to the younger age groups; however, the option specifically identifies lower mortality and greater longevity. Option A is wrong because increasing land area does not directly create older people. Option B describes a change in representation, not a demographic process. Option D is not a reliable cause: a continually rising birth rate usually increases the younger population and may reduce the elderly share proportionally. Memory cue: longer lives increase the chance of an ageing population; always distinguish number from percentage.

Related tags

Ageing PopulationMortality DeclineLongevityAge StructureProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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