Wegener examines the location of tiny rocks and the direction of grooves formed by large glaciers scraping across southern areas of africa, south america, australia, antarctia, and india. he concludes that if all these places were fitted together, they would form a continuous ice sheet expanding outward in all dirctions.

This gives evidence for Congenital Drift and it supports the idea that the continents have moved.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101