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The average age of a society is increasing. Which change is most consistent with this trend?

Answer and explanation

Correct answer: A declining relative share of children and a rising share of elderly people

The governing concept is age structure: the average age of a population rises when the proportional weight of older groups increases relative to younger groups. A decline in fertility produces smaller child cohorts, while improved survival and longer life expectancy allow more people to reach old age. Together, these changes increase the mean or average age. Therefore, option A is correct. Option B is unlikely because persistently high fertility creates a broad base of children and usually keeps the average age low. Option C would make the population younger, not older. Option D cannot generally create population ageing because an inflow made up only of newborns would enlarge the youngest group. The conclusion concerns relative age shares, not merely the total number of people.

Related tags

Average AgePopulation AgeingAge CompositionFertility DeclineAge StructurePopulation CompositionGeographyClass 12 Mcq

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