Answer:
The existence of fossils (both animals and plants) on the separated continents.
Step-by-step explanation:
Continental Drift- This is a theory of the Earth proposed by Alfred Wegener in 1912. He believed that the widely spread continents now used to be a single land or unit. Many people didn't believe him at first. However, he supported his theory by explaining the earth's geologic history.
One evidence of this is the existence of the same animals and plants on the different continents. This was based on the evidence of fossils that he gathered. An example of this is the earliest known reptile, the mesosaurus. This is a reptile that comes from the Early Permian of South Africa and South America. By basing it on evidence, Wegener stated that the mesosaurus can also be found in other continents.