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If birth rate falls and life expectancy rises what change is possible in the long run?

Answer and explanation

Correct answer: Share of elderly population may increase

Direct answer: Option A is correct. Birth rate tells us how many babies are born, while life expectancy indicates the average length of life people may live under existing conditions. If fewer children are born and people live longer, children form a smaller share of the total population while older people survive for more years. Over the long run, the proportion of elderly people may therefore increase, producing an ageing population. Option B is wrong because a lower birth rate does not turn all people into children; it usually reduces the proportion of children. Option C is wrong because population changes gradually and does not become zero immediately. Option D is wrong because migration is influenced by economic, social, political and environmental factors and does not automatically stop. Memory cue: fewer births plus longer lives usually means an older age structure.

Related tags

Ageing PopulationBirth RateLife ExpectancyPopulation GrowthPopulationGeographyClass 9 Mcq

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