How does this document help you address the question:What caused the dust Bowl

i think it was the economic depression and the drought that caused the dust bowl.?

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.

d)to gain support for the independence movement.

hope this : )