Question

What causes the lithospheric plates to move

Answer 1

convection currents in the mantle

Step-by-step explanation:

Convection currents in the mantle are always moving, and make the plates move too. The plates are resting on top of the mantle, which is where the convection currents are, which make them move along with the magma.

Answer 2

The heat from the Earth's cores radioactive process makes the lithospheric plates move sometimes away or toward each other.

Hope it helps :)