What did the colossal heads represent to the olmecs

The bishnoi conservationist is take care of nature and grow with it, instead of exploiting it explain the statement

Why is it economically necessary for the east germans to build berlin wall

Black death spread because of what problem in medieval europe? which one is it i need the answer quick . a- overcrowded cities b-too many farm animals c-not enough qualified doctors d-all of the above