Fossils on the continent may be similar to fossils on another continent. this observation supports which theory ?

This observation supports the theory of continental drift, and supports the theory of supercontinents.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."