Why do the plates move?

The plates on the surface of our planet move due to the intense heat of the Earth's core, which drives the melted rocks of the mantle.

It moves in a pattern called convection cells. Convection cells are formed when warm matter rises, cools, and finally sinks.

When the cooled material sinks, it heats up and rises again.

Plates move due to the intense heat of the earth's core which derives from the mantle, this is because of the movement of the molten magma inside the earth.