________, more than any other cause, explains population aging in the past.

Question

Quizplus · Accepted Answer

A decline in the fertility and birth rate is the primary cause of population aging in the past, as fewer children were born and the population grew older over time. Increased longevity may contribute to aging as well, but it is not the main factor that explains population aging. An increase in the birth rate or fertility rate would actually result in a younger population, so they would not be the best choices to explain population aging.

________, More Than Any Other Cause, Explains Population Aging in the Past