The correct answer is option 1, Alfred Wegener. Alfred Wegener proposed the Continental drift theory. This theory suggests that the continents were once joined together in a supercontinent called Pangaea and have since drifted apart. Wegener gathered evidence from different fields such as geology, paleontology, and climate to support his idea. He observed that the continents seemed to fit together like pieces of a puzzle, such as the matching coastlines of South America and Africa. He also observed similar fossils and rock formations on different continents, further supporting his theory. Although initially met with skepticism, Wegener`s idea eventually laid the foundation for the modern theory of plate tectonics. His work revolutionized our understanding of how Earth`s continents have evolved over time.