What are the lines of evidence that Alfred Wegener used to support the idea of continental drift? Why did scientists of his day doubt that continents drifted?

Wegener presented a number of evidence to prove his plate tectonic theory, such as:

The matching of rocks on each side of the Atlantic Ocean like a puzzle. His knowledge hat organisms such as freshwater reptiles were found in almost all continents He also identified organisms that live in different continents, and could not possibly cross over to the other continents due to water bodies (oceans) separating the continents.

Wegener's plate tectonic theory caused doubts to other scientists, because of the way he presented his evidence. Other scientists considered his mechanisms unrealistic