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If the birth rate is falling and life expectancy is rising, what long-term change is possible?

Answer and explanation

Correct answer: The share of the elderly population may increase

The direct answer is A: the proportion of elderly people may rise over the long term. Life expectancy is the average length of life people can expect under current conditions. When it rises, more people survive to older ages. At the same time, a falling birth rate means fewer children are added to the youngest age groups. Step by step, longer survival increases the upper part of the age structure, while fewer births reduce the relative size of the lower part. The result can be population ageing. Option B is impossible because people do not all become infants. Option C is wrong because a falling birth rate does not make the population disappear immediately. Option D is wrong because migration is influenced by social, economic and other conditions and does not automatically stop. Memory cue: fewer births plus longer lives usually shifts the age structure upward.

Related tags

Population AgeingBirth RateLife ExpectancyPopulation GrowthPopulationGeographyClass 9 Mcq

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