when Earth is between the Moon and the Sun when the Moon passes between Earth and the Sun when the Sun is between Earth and the Moon when Earth is at a 90° angle to the Moon and the Sun
I gave my students this multiple choice question: Which of these best describes when a lunar eclipse will occur?

Only one answer is correct among these 4 choices:
- when Earth is between the Moon and the Sun
- when the Moon passes between Earth and the Sun
- when the Sun is between Earth and the Moon
- when Earth is at a 90° angle to the Moon and the Sun

Could you tell me which one is correct?

when Earth is between the Moon and the Sun