HELP! Why is the percentage of population under age 15 important for predicting future population growth?

The more there are people under age 15 the more population growth there will be in the future i hope this is understandable

Calcinosis is the diagnostic term that means an abnormal buildup of calcium on the kneecap (patellar) surface. it is a term uses to describe a group of disorders in which calcium deposits form in the skin. it is also referred to the abnormal deposit of calcium phosphate.

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.