Fact 1: Preventing the transfer of heat from an organims 's body causes that organism to keep warm.

Fact 2: First, a hat serves as insulation against convective heat transfer.

Given the two facts above, answer the question "What serves as insulation to keep the body warm?" with the following options: 
- exoskeleton
 - wearing hats
 - wearing glasses
 - Animal fur
 - sweating
 - with their fur
 - wearing jewelry
 - wearing nail polish


 

  wearing hats       