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A region receives large-scale in-migration mainly of people aged 20-40 because of new jobs. What is the most likely short-term effect on its age structure?

Answer and explanation

Correct answer: The share of the working-age group will increase

The governing concept is age composition, which describes the distribution of a population among age groups. People aged 20–40 are generally included in the working-age population. When a region receives many migrants from this age range, the numerator representing working-age residents rises immediately, while the total population also rises. If the migrants form a substantial share of the inflow, the working-age proportion is likely to increase and the dependency ratio may temporarily decline. Option B is wrong because young-adult migration cannot immediately make older people the largest group. Option C is an extreme and unsupported claim, and option D ignores the direct demographic effect of selective migration. Later births, family reunification and return migration could modify the pattern.

Related tags

In-MigrationWorking-Age PopulationAge StructureLabour MigrationPopulation CompositionGeographyClass 12 Mcq

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