Fact 1: Dilation occurs when cell walls relax.

Fact 2: Relaxation promotes relaxation and easing of tension.

Given the two facts above, answer the question "What occurs when the tension of cell walls are eased?" with the following options: 
- Sleep
 - exercise
 - friction
 - Exfoliation
 - recovery
 - dilation
 - sweating
 - murmur


 

      dilation   