Answer:
1. Flood
2. Fertility
Explanation:
1. The reason people living in the northern areas of the fertile crescent moved into other areas is due to FLOOD.
This is caused as a result of excessive snow falling on the mountain in the surrounding areas which later turn to water and as well the high temperatures which increases the flow of rivers.
2. FERTILITY allowed people to settle in southern Mesopotamia. This is because the area of southern Mesopotamia which supports the growth of agriculture and human settlements with little or no potential hazards
