Use the information to answer the question. I lived in an ancient civilization between two rivers, the Tigris and Euphrates. The rivers often flooded and sometimes went dry. We developed systems of dams and canals to bring water to our fields. We created a system of writing and recorded information on clay tablets.

In which ancient civilization did I live?
A.
China
B.
Egypt
C.
Greece
D.
Sumer

Which reason best explains why certain areas of southwest asia have low population density? a. the semi-arid climate makes farming difficult because it produces very little rainfall.b. the moist climate limits job opportunities because it reduces oil production.c. the semi-arid climate produces heavy rainfall that contributes to devastating floods. d. the moist climate reduces agricultural production by causing water shortages.