Answer:
All of them having common criteria such as a habitable climatic zone, the proximity of large river basins and geographical isolation from other regions of the world by mountains, deserts or seas
Explanation:
https://www.worldatlas.com/articles/what-is-a-culture-hearth.html
Https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjascq6vOLM...
You will find the information you need here. :3 Good luck!
(Says I have to cite my sources so here goes: I just copy/pasted your question into Google lol)
B. The rivers were used to sustain life by growing crops and food and having an unlimited drinking supply.
False because its where people have a say in the economy <span />