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In which situation can total population appear stable but age structure may change?

Answer and explanation

Correct answer: Incoming people are young and outgoing people are elderly, but their numbers are equal

The correct answer is B. Total population depends on the number of people, but age structure depends on how those people are distributed among age groups. If 1,000 young people enter an area and 1,000 elderly people leave, the total population does not change because the numerical balance is zero. Nevertheless, the area now has a larger share of young people and a smaller share of elderly people. This can affect future births, schools, employment needs and dependency patterns. A would leave the population and its age structure unchanged, apart from no movement or vital events occurring. C concerns land area, not the age composition of residents. D is an extreme statement and does not describe a process that changes the structure. Memory cue: equal numbers can still have unequal demographic effects when their ages differ.

Related tags

Age StructureComposition ChangeMigrationPopulation CompositionGeographyClass 12 Mcq

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