I know it's late, but it's Eve.
Answer:
Sumerian villages grew
Explanation:
Nomads moved into the fertile land and began to form small villages which slowly grew into large towns. Eventually these cities developed into the civilization of the Sumer. This land is often called the "Cradle of Civilization". As the Sumerian villages grew into large cities, they formed city-states.
<span>The bison would return and white people would disappear.</span>
<span> A. cold, starvation, help from Squanto and other Indians</span>