You are presented with the question "What does the skin protect the body from?" and the following answer choices: 
- cigarettes
 - pain
 - discoloration
 - sun's heat
 - disease
 - blood
 - rays or beams
 - contamination

Now knowing that skin is used for protecting the body from harmful substances and contamination is the unintended presence of harmful substances or microorganisms in food, choose the best answer.


 

        contamination 