the rotation of Earth the direction of the wind the pull of Earth's gravity the movement of plates on Earth's crust
I gave my students this multiple choice question: 7. What is the cause of most earthquakes?

Only one answer is correct among these 4 choices:
- the rotation of Earth
- the direction of the wind
- the pull of Earth's gravity
- the movement of plates on Earth's crust

Could you tell me which one is correct?

the movement of plates on Earth's crust