Question

what was wegeners hypothesis called?
seafloor spreading
plate tectonics
continental drift
slab pull

Explanation:

Alfred Wegener proposed the continental - drift hypothesis, which suggested that the continents move relative to one another. Seafloor spreading was proposed later by Harry Hess, plate tectonics is a more comprehensive theory that built on continental drift, and slab - pull is a mechanism in plate tectonics.

Answer:

Continental drift