Please help me figure out what kind of pyramids these are!! They can either be:
Stable
Young
Old

The 1st pyramid is Old

The 2nd pyramid is Young

The 3rd pyramid is Stable

Explanation:

The amount of young people and old people in pyramid 3 are about equal (it doesn't have to be exactly equal)

There are far more young people than old people in pyramid 2, making in young.

There are more old and middle-aged people in the first pyramid, making it old.

answer; the period of time known as the middle ages;