Final answer:
Alfred Wegener believed the continents were once part of a supercontinent called Pangea.
Explanation:
True. Alfred Wegener proposed the theory of continental drift in the early 1900s, suggesting that all continents were once part of a supercontinent called Pangea. He supported his idea with evidence like the fit of continents and matching fossils, indicating that the continents were once connected.
Learn more about continental drift theory here:
https://brainly.com/question/51117419
