Earth rotates around the sun. Earth revolves around the sun. The sun rotates around Earth. The sun revolves around Earth.
I gave my students this multiple choice question: Planets in our solar system have different solar years. Which statement explains the cause of an Earth solar year?

Only one answer is correct among these 4 choices:
- Earth rotates around the sun.
- Earth revolves around the sun.
- The sun rotates around Earth.
- The sun revolves around Earth.

Could you tell me which one is correct?

Earth revolves around the sun.