WORLD CIVILIZATION

Detailed explanation-1: -By 5000 b.c., some historians believe, farms in the Zagros foothills did not have enough land to grow food for the increasing number of people. As a result, villages began to suffer from food shortages. Below the foothills and to the south, the Euphrates and Tigris Rivers ran through flat plains.

Detailed explanation-2: -Food Shortages in the Hills A shortage of food forced people to move from the foothills of the Zagros Mountains to the plains between the Tigris and Euphrates rivers. This plains area became Sumer.

Detailed explanation-3: -One problem that occurred in the foothills was a food shortage due to an increase in population. To solve it, farmers moved from the foothills to the plains of Sumer, near the Tigris and Euphrates rivers.

Detailed explanation-4: -Mesopotamia faced many problems during the time of the civilization. One of them was the food shortages in the hills. There was a growing population and not enough land to fulfill the food needs for everyone. Also, sometimes the plains didn’t have fertile soil.