what feature makes up much of the U.S border with Mexico

5 answers

What river do you see on this map that makes up part of this border?

http://www.worldatlas.com/webimage/countrys/namerica/usstates/artwork/rivers/riogrand.htm
missippi
Qhat border makes up much of mexico
i need help on this one question
witch is this
@mr.sue that helped ty