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
The greatest common factor is 1
Answer:
I believe that they are decendents of the earliest split from ancient Eurasian populations.
The answer is narrow coastal plains
