Fact 1: Light enters the eye through an opening called the pupil.

Fact 2: If there is a strong light, the pupil gets smaller.

Given the two facts above, answer the question "what do pupils get when reacting to strong stimuli?" with the following options: 
- smaller
 - Energy.
 - grow
 - Energy
 - It expands
 - expelled
 - properties
 - nerves


 

 smaller        