Question

What are the two forces that change the surface of the Earth? What is the theory of Continental drift?

Answer 1

Answer:

The processes of seafloor spreading, rift valley formation, and subduction (where heavier tectonic plates sink beneath lighter ones) were not well-established until the 1960s. These processes were the main geologic forces behind what Wegener recognized as continental drift.

Answer 2

Answer:

The two forces that change the surface of the Earth are water action and wind action.

In the early 20 century, Wegener published a paper explaining his theory that the continental landmasses were drifting across the Earth, sometimes plowing through oceans and into each other. He called this movement 'Continental Drift '.