<span>The answer is letter C.
Plates move in different directions because the magma moves in “cells” which circulate in different directions. The intense heat of the Earth’s core causes molten rock in the mantle layer to move in a pattern called convection cell. When this occurs warm material rises, cools, and eventually sinks down, as this happens, it is again warmed and it rises again.
Plates help themselves move instead of just surfing along the mantle because of giant convection cells that change the structure of rocks through heat.<span>
</span></span>
