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Which factor can suddenly increase the share of the working-age population in an area?

Answer and explanation

Correct answer: Large-scale in-migration of working-age people

Migration can change the age structure much faster than births or deaths usually do. People who move for jobs are often young adults in the working-age group. If many such people enter an area, the number and proportion of working-age residents rise suddenly. Therefore, option A is the correct answer.

The effect is especially clear when the incoming population is concentrated in ages commonly defined as working age, such as 15–59 or 15–64, depending on the statistical system. Newborns increase the child population, and a rise in elderly residents increases the older-age share; neither directly raises the working-age share. A zero birth rate would eventually affect younger cohorts, but it would not suddenly bring more working-age people into the area.

Related tags

MigrationWorking Age PopulationAge Structure ChangeIn MigrationAge StructurePopulation CompositionGeographyClass 12 Mcq

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