The geographic feature which allowed Egyptian civilization to flourish was A. the Nile River
B. the Levant
C. the Sahara Desert.
D. the Mediterranean Sea.

the Nile River

Explanation:

Egyptian civilization developed along the Nile River in large part because the river's annual flooding ensured reliable, rich soil for growing crops.

the exodus of these people from constantinople contributed to the revival of greek and roman studies, which led to the development of the renaissance in humanism and science. byzantine emigrants also brought to western europe the better preserved and accumulated knowledge of their own greek civilization