Final answer:
Scientific evidence found after Alfred Wegener's death supported his continental drift hypothesis, with advances in understanding plate tectonics and seafloor spreading providing the necessary proof.
Step-by-step explanation:
After Alfred Wegener's death, scientists ultimately found evidence supporting his hypothesis of continental drift. While Wegener faced skepticism during his lifetime, lacking the necessary proof of mechanism, further research posthumously provided the needed confirmation. It turned out that the geophysical evidence, including seafloor spreading and fossil distribution across continents, and the understanding of plate tectonics, acted as the definitive evidence that supported Wegener's ideas.
The continental drift hypothesis suggested that the continents were once joined together in a single landmass and have since drifted apart. This was not readily accepted in Wegener's time; however, advances in technology and geosciences eventually vindicated his theory. The resistance to his hypothesis serves as a historical lesson in scientific skepticism and the progression of scientific understanding once clear evidence and mechanisms aligned with Wegener's original ideas were discovered.