The alliance between Great Britain, France, and the United States during WWII was called the Allies. If you're truly in High School; you should know this by now. But I'm not judging-so don't take it the wrong way.
C. The increase in the use of coal as a source of heat and energy
Answer:
C. A rock that has been eroded
Explanation:
The war effected many people. Many people died, most resources, if not all, went to the war. After the war, many people wanted to be normal again but could not. The war had effected the economy, people's lives, and some political views. A lot of people had a hard time with getting jobs or money and a lot of families were devastated by the war. Not only normal people were effected, also countries as a whole. The relations between communist countries, such as the Soviet Union, and non-communist countries, such as America, stayed tense. Even until this day, these countries have issues and a third world war is somewhere in the back of our minds'. The Cold War began after World War 2 and it did not end until the late twentieth century.