Earth rotates on its axis. Earth revolves around the Sun. The Sun rotates on its axis. The Sun revolves around the galaxy.
I gave my students this multiple choice question: What explains how day and night occur in different parts of Earth?

Only one answer is correct among these 4 choices:
- Earth rotates on its axis.
- Earth revolves around the Sun.
- The Sun rotates on its axis.
- The Sun revolves around the galaxy.

Could you tell me which one is correct?

Earth rotates on its axis.