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If the 20 to 39 age section of a population pyramid is unusually broad, which factor may explain it?

Answer and explanation

Correct answer: In-migration of young adults

The 20–39 age group contains mainly young adults, students, recent migrants, and workers. If this part of a population pyramid is wider than expected, the country or region may have received many people in these ages from elsewhere. Employment, education, marriage, or other opportunities can attract young adults and enlarge this section.

Therefore, option A is the best explanation. A high infant mortality rate would tend to narrow the youngest groups, not specifically widen ages 20–39. Out-migration of elderly people would affect older ages and would not by itself create a broad young-adult section. A complete end of births would eventually narrow the youngest base, but it would not explain an unusually broad working-age group in the present.

Related tags

Age Selective MigrationYoung AdultsPopulation PyramidWorking Age PopulationAge StructurePopulation CompositionGeographyClass 12 Mcq

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