Fact 1: Shivering occurs when many muscles contract a little bit all at once.

Fact 2: Honey bees generate heat by consuming honey and shivering their muscles.

Given the two facts above, answer the question "Who can shiver?" with the following options: 
- bats
 - Sidewalks
 - humans
 - Bees
 - koalas
 - Mountains
 - Trees
 - people


 

    Bees     