Question

What is plate tectonic theory

Answer 1

Plate tectonics is the theory  that the outer rigid layer of the earth (the lithosphere) is divided into a couple of dozen "plates" that move around across the earth's surface relative to each other, like slabs of ice on a lake.

Answer 2

The plate tectonics theory states that the crust of the Earth is made up of seven major plates and a few minor plates

Cheers!!