Explain why the discovery of the fossil remains of Mesosaurus in both South America and Africa, but nowhere else, supports the continental drift hypothesis (and, of course, Plate Tectonics). it's a bogus question, it can't be explained it doesn't explain continental drift...the Mesosaurus was a flying animal the Mesosaurus was able to travel from South America to Africa because the plates were once connected. the discover of this fossil says that the Mesosaurus died on the other continents because the other continents drifted toward harsher weather regimes

In the period when the mesosaurus existed, the Earth was a much different plates than what it is now. The continents were all merged, forming one super-continent called Pangaea. South America and Africa were part of this continent, and they were merged together in the southern part of Pangaea. This formed one very large habitat for the mesosaurus, as the southern portions of South America and Africa had the same climate conditions. This resulted in the mesosaurus to be able to spread on both of these continents because at that time they were one, thus there wasn't any barrier between them. As the plates started to move away from each other, they started to form new continents, with South America and Africa being two separate land masses thousands of km away, so despite their distance in the present, we have fossils of the same animal in both of them.