How are the amazon and mississippi similair

The Mississippi River has many small tributaries, but its primary tributaries are the Ohio River and the Missouri River. The Amazon River also has a large number of tributaries, including the Rio Negro, which is one of the largest rivers in the world in terms of volume. The Nile’s primary tributary is the Atbara River.

They both played a role in civilization they both are key players in the sourounding ecoystems