Answer:
I wanna say river
Explanation:
Because the need a water source for plants and other things like that. And an ocean wouldn't be able to help because well it's salt water.
Sorry this is kind of late, but the answer is C. Western Europe and Sub-Saharan Africa.
Idk that i hope i can help some thing else
(false) Known in the north as the Battle of Bull Run and in the South as the Battle of Manassas, this battle, fought on July 21 1861 in Virginia was the first major battle of the Civil War. It was a Confederate victory.