Question

what river drains almost half of the united states and serves as a transportation route between the upper midwest and the gulf coast?
○ ohio river
○ columbia river
○ mississippi river
○ rio grande river

Explanation:

The Mississippi River drains a vast area that includes almost half of the United States Midwest. It has been a crucial transportation route for a long time, connecting the upper regions (like the Midwest) to the Gulf Coast. The Ohio River is a tributary of the Mississippi. The Columbia River is mainly in the Pacific Northwest. The Rio Grande is on the border with Mexico.

Answer:

Mississippi River