conduction from solar heating heat convection from the mantle global winds ocean currents
I gave my students this multiple choice question: Which of the following best explains why the tectonic plates of Earth move?

Only one answer is correct among these 4 choices:
- conduction from solar heating
- heat convection from the mantle
- global winds
- ocean currents

Could you tell me which one is correct?

heat convection from the mantle