Question

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 _____.

Answer 1

birth decline combined with longevity

Step-by-step explanation:

So, it could be a problem for the governments to manage the retirement start age.