Fact 1: Disease has a negative impact on an organism.

Fact 2: Bacteria and Viruses Bacteria and viruses can cause diseases.

Given the two facts above, answer the question "What can have a negative impact on an organism?" with the following options: 
- viruses
 - leukemia
 - Pollution
 - chickenpox
 - money
 - rest
 - health
 - bacteria


 

        bacteria 