mississippa arkansaw river
I believe that would be Hawaii.
Most of the borders of the U.S. are marked by oceans; the next most frequent natural barriers are rivers.
Spain's borders do no follow rivers.
the st.lawrence river forms part of the border between the u.s and canada. The rio grande borders between the u.s and mexico.
They are formed as borders because they are formed naturally.
They are formed as borders because they are formed naturally.
The rivers
Physical features such as rivers, mountains, and desert regions are used to define US borders. For example, the Rio Grande River serves as the border between the US and Mexico in certain areas, while the Rocky Mountains define parts of the border between the US and Canada.
Both the St Lawrence and Niagara Rivers do
Tigris and Euphrates Rivers.
Rivers