Answer: Fossils
Explanation: The movement of continents on tectonic plates is can be known by the evidences of the fossils. The fossils were found on the different shores of the different continents which suggests that they were once joined together and has now been apart due to the tectonic plate activity.
Example: The fossil of Mesosaurus which is a fresh water reptile was found on the both sides of the continents of Brazil and South Africa. This suggests that the continents were once joined together.
