The movement in the mantle layer drives the motion of the plates on Earth's crust.
Explanation:
The mantle layer is the layer below the Earth's crust. This layer has movement in it, a movement known as convection currents. The movement is circular between the upper and lower part of the mantle. This movement creates lot of pressure on the crust above it, and that pressure combined with the high temperatures, manages to crack the crust, create tectonic plates, and move them.
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