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In the past, there were 20 times more children than older people. then there were 7 times more people under age 15 than over age 64. currently, there are 3 times as many children as there are elders. these changes in the age make-up of the population are referred to as a(n) "_____."

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For the answer to the question above,
these changes in the age make-up of the population are referred to as a "DEMOGRAPHIC SHIFT"

Demographic Shift is the transition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrial to an industrialized economic system.

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