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

Fact 2: Pollution is the release of harmful substances into the environment.

Given the two facts above, answer the question "What does the skin protect against?" with the following options: 
- smallpox
 - A virus
 - disease
 - sun's heat
 - cancer
 - leukemia
 - Pollution
 - heat energy


 

       Pollution  