How did African American participate in the struggle for independence

Why did the outbreak of world war 2 create a need for new military bases across the country?

All of the following were grievances against the king of england except:

Consider the events in alfred wegener's life that led to his development of the continental drift hypothesis. review the items below and determine whether each item is (1) an observation that led alfred wegener to develop his continental drift hypothesis, or (2) evidence wegener gathered to support his proposal.