You are presented with the question "What senses differences in temperature?" and the following answer choices: 
- the skin
 - Electric devices
 - animals
 - an electric stove
 - nerve endings
 - an organism's body
 - Most plants
 - peachleaf willow

Now knowing that some touch receptors sense differences in temperature or pain and touch receptors are free nerve endings or nerve endings that are surrounded by a capsule, choose the best answer.


 

     nerve endings    