What led to the american involvement in ww1

During the era of european expansion, what was the biggest reason for spain’s push for exploration?

How is the man caricatured to show that he is a responsible citizen

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.