It was primarily "the Industrial Revolution" that led European countries to seek natural resources in colonies around the world during the 19th century, since these natural resources were uses in the factories to make products that were sold.
I know this is pretty late but
Question 19: a crippled Germany unable to threaten France in the future
question 20:stripping Germany of its overseas colonies
Question 21:No—Germany's old colonies in Africa were turned over to France and Britain
The excessive amount of power given to the states.