Part Short Answer (10 points) 21. List and explain 3 main causes or historical justifications for imperialism. (6 points) 22. List and explain 2 effects of imperialism (4 points)The __ was developed in Los Alamos, New Mexico and resulted in an arms race between the United States and the Soviet Union. squareThe Soviet Union set up a __ that prevented critical supplies from entering West Berlin. squareThe square provided economic assistance to some European countries after World War II. squareNATO was a military square States and some western European countries. square between the United pointPREV 123456789 NEXT