In most cases the greatest force that moves seafloor plates is:

Question

Quizplus · Accepted Answer

Slab pull is the greatest force that moves seafloor plates, as the high-density seafloor slab is pulled by gravity into the lower-density mantle. While convection and the force exerted by the plate may contribute to plate motion, slab pull is the primary force driving the movement of seafloor plates. Ridge push is also a factor in plate motion, but its contribution is generally considered to be secondary to slab pull.

In Most Cases the Greatest Force That Moves Seafloor Plates