Earth gives light and heat energy to the Sun. Earth gives only heat energy to the Sun. The Sun gives light and heat energy to Earth. The Sun gives only light energy to Earth.
I gave my students this multiple choice question: Which is true about the Sun and Earth?

Only one answer is correct among these 4 choices:
- Earth gives light and heat energy to the Sun.
- Earth gives only heat energy to the Sun.
- The Sun gives light and heat energy to Earth.
- The Sun gives only light energy to Earth.

Could you tell me which one is correct?

The Sun gives light and heat energy to Earth.