Fact 1: Skin is used for protecting the body from harmful substances.

Fact 2: Skin is a protective organ.

Given the two facts above, answer the question "What protects the body from harmful substances?" with the following options: 
- food
 - organs
 - toughness
 - viruses
 - fur
 - Collagen
 - bacteria
 - sweating


 

  organs       