Slab pull seems to be a more important driving force for moving tectonic plates than ridge push.

Question

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Slab pull is the force that moves a tectonic plate downwards into the mantle, while ridge push is the force created by the upward movement of magma at mid-oceanic ridges that pushes the tectonic plates apart. While both forces contribute to plate movement, slab pull is generally considered to be the larger driving force.

Slab Pull Seems to Be a More Important Driving Force