What was the main cause and consquance of ww2?

How did the industrial revolution give an advantage to industrialized european nations over non-industriallized nations?

Why did poland, hungary, and east germany join the warsaw pact? a)their people voted to join in free elections. b)their efforts to join nato failed. c)they wanted to stop the spread of communism in europe. d)they were soviet satellites that had little choice.

Why did the french settle in new france