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In the long run, low birth rates can promote which age structure?

Answer and explanation

Correct answer: Ageing population

Age structure describes the relative size of children, working-age people, and older people. When birth rates stay low for many years, each new generation is smaller than the previous one. If life expectancy is also high, older people form a larger share of the population. This long-term pattern is called population ageing, so option B is correct.

A low birth rate reduces the number of children entering the population and gradually narrows the base of the age pyramid. Meanwhile, people already alive move into older age groups, and longer survival increases the top share. The result is not a child-only or highly youthful structure. A very broad pyramid base normally indicates high fertility, which is the opposite of the condition described.

Related tags

Low Birth RatePopulation AgeingFertilityAge StructurePopulation CompositionGeographyClass 12 McqRdgdfgdfg

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