You are presented with the question "What can an prevent the transfer of heat from an organism's body?" and the following answer choices: 
- Sulfur
 - cilia
 - skin
 - dirt
 - oil
 - immune
 - fur
 - fats

Now knowing that preventing the transfer of heat from an organims 's body causes that organism to keep warm and dirt can keep animals warm, choose the best answer.


 

    dirt     