Answer:
The correct answer is D Mantle convection & Slab pull because ridge-push always occurse at diverging plate boundaries not converging.
Explanation:
Slab pull is a force that arises at the boundary of a subduction zone. Of the two plates that form the boundary, the denser plate begins to sink beneath the less dense plate. The sinking edge of the lower plate continues to be pulled downward by gravity. Mantle convection also can drag the edge of the plate downward.
