the vacuum of space. intense sunlight. micrometeoroids. water loss.
I gave my students this multiple choice question: The outer layers of astronauts' space suits are reflective in order to protect them from

Only one answer is correct among these 4 choices:
- the vacuum of space.
- intense sunlight.
- micrometeoroids.
- water loss.

Could you tell me which one is correct?

intense sunlight.