the Moon revolving around Earth. Earth revolving around the Sun. the Moon rotating on its axis. Earth rotating on its axis.
I gave my students this multiple choice question: The cycle of night and day on Earth is a result of

Only one answer is correct among these 4 choices:
- the Moon revolving around Earth.
- Earth revolving around the Sun.
- the Moon rotating on its axis.
- Earth rotating on its axis.

Could you tell me which one is correct?

Earth rotating on its axis.