Question

what is the theory of plate tectonics

Answer 1

it explains the movement of 7 major plates and many minor plates and there formation and their physical features.
hope it helps

Answer 2

theory is that these plates are 7 in number and are constantly moving in earlier times there was no Australia no Asia or America there was a single landmass called good want land these plates came into movement after when the molten lava of earth cooled down their boundaries are different in shape like Conical or interjoined the movement sometimes form mountains valley