Light travels very fast. Light travels in straight lines. Water reflects light energy. Water absorbs light energy.
I gave my students this multiple choice question: Which statement explains why light from the Sun can warm up water in a glass?

Only one answer is correct among these 4 choices:
- Light travels very fast.
- Light travels in straight lines.
- Water reflects light energy.
- Water absorbs light energy.

Could you tell me which one is correct?

Water absorbs light energy.