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If the 0 to 14 age group is declining while the 30 to 49 age group is increasing, what is the most appropriate explanation?

Answer and explanation

Correct answer: Large cohorts born earlier are now entering middle adult ages

Age groups are not fixed populations; people move from one age group to the next as time passes. The size of an age group therefore reflects the number of births in earlier years, deaths, and migration. A country can have fewer children today because recent births are lower, while still having many adults because a large group born decades earlier has reached middle adulthood.

Thus, the 30–49 group may be increasing because earlier large cohorts are now entering or moving through those ages. At the same time, low recent fertility makes the 0–14 group smaller. This is why option A is correct. Option B is wrong because age groups need not change in the same direction, and options C and D ignore the connection between birth history and age structure.

Related tags

Cohort EffectAdult PopulationChild DeclineAge StructurePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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