Shivering occurs when many muscles contract a little bit all at once, and heat production is increased by shivering and non-shivering thermogenesis . Given these facts, what happens when many muscles contract a little bit all at once among the following options:
- heat is produced
 - To keep their body heat.
 - biceps
 - sweating
 - digestion
 - rapid expansion
 - preventing heat transfer
 - death


 

 heat is produced        