What river forms a large portion of the border between the united states and mexico?

Salutations!

What river forms a large portion of the border between the United states and Mexico?

The Rio Grande River forms a large portion of the border between the United States and Mexico. The Rio Grande River is a global river that separates Mexico and the United States. It starts from Colorado, and then dribbles till Gulf of Mexico.

Hope I helped :D

Answer your driving test ;

None   they are   equally likely to occur on any plate boundary