Question

which of the following occurs because of convection currents?
the mantle increases in size.
pressure in the crust increases.
tectonic plates move.
the temperature of the core decreases.

Explanation:

Convection currents in the Earth's mantle cause the movement of tectonic plates. The mantle's heat - driven convection cells drag the plates at the surface. The mantle doesn't increase in size due to convection, crustal pressure isn't directly increased by convection in this way, and core temperature isn't decreased by convection currents.

Answer:

C. Tectonic plates move.