Here's why the other options are incorrect:
* Subduction: This is a process where one tectonic plate slides beneath another. While it plays a role in the movement of continents, it's not the overarching hypothesis explaining their overall movement.
* Erosion: Erosion is the process of wearing away rock and soil. It's a geological process but doesn't explain the large-scale movement of continents.
* Seafloor spreading: This is the process where new oceanic crust is formed at mid-ocean ridges and spreads away. This is a critical part of plate tectonics, but it's not the hypothesis that explains continental drift.
Continental drift was the initial theory proposed by Alfred Wegener in the early 20th century. While it was initially met with skepticism, evidence from various fields of geology, such as matching coastlines, fossil distributions, and rock formations, ultimately led to its acceptance as a foundational concept in plate tectonics.
