Tennessee is separated from Arkansas by the Mississippi River.
The Mississippi River is the East boundary for Arkansas.
The Mississippi River is the border separating Tennessee and Arkansas.
The natural boundary that separates New Jersy from Pennsylvania is the Delaware river
the equator...... i think
Tien Shan Mountains
Fall Line :)
The Ural Mountains.
A reef or low island.
The Pyrenees Mountains.
The Rio Grande river. The Rio Grande, or Big Rivernew london
The Mississippi River forms a natural border between Mississippi and Louisiana to the west and flows along the eastern edge of Arkansas. It also serves as a boundary between Mississippi and Tennessee to the north. The river is a significant geographical feature in the region, influencing both the ecology and the economy.
The natural boundaries between the continents are oceans and seas. For example, the Atlantic Ocean separates Europe and Africa from the Americas, while the Pacific Ocean separates Asia and Australia from the Americas.