Which body of water is to the east of africa? > atlantic ocean > pacific ocean > mediterranean sea > red sea

I believe it's Red Sea, but I'm not 100% sure.

red sea

Explanation:

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.