You are presented with the question "What are used for protecting the body from harmful substances?" and the following answer choices: 
- critical organs
 - body critics
 - fur and fat
 - protective bony armor
 - redundant organs
 - layers of fat
 - sea urchins
 - solar waves

Now knowing that skin is used for protecting the body from harmful substances and eyes and skin are the critical organs, choose the best answer.


 

 critical organs        