The Ural mountains create a distinct border between Europe ans Asia.
Hope this Helps!
This are some of the things behind imperialism in Africa.
1) Need for resources,
2) Political competition
3) Technological advances
Economic factors were more of a driving force behind imperialism because the imperialists were in need for natural resources for them to improve their technology and their national pride.
We were far away from Germany, Italy and Japan. Water seperated the U.S. from the attacking countries so it was harder for them to attack the U.S.
