Because the world wanted there to be Two:)
Rocky mountains and Appalachian Mountains
The Rocky Mountains and the Appalachian Mountains.
The Rocky Mountains and the Appalachian Mountains are two prominent mountain ranges in the United States. The Rocky Mountains stretch from Canada to New Mexico, while the Appalachian Mountains run from Georgia to Maine.
Appalachian Mountains and the Rocky Mountains
The Rocky Mountains and the Appalachian Mountains.
Rocky mountains and the Appalachian mountains
rocky mountains and Appalachian mountains
The Rocky Mountains and the Appalachian Mountains.
The Rocky Mountains and the Appalachian Mountains.
Rocky Mountains and Appalachian Mountains.
They are the Rocky Mountains in the West and the Appalachian Mountains in the East.
Appalachian and Rocky Mountains.