You are presented with the question "What can have a negative impact on an organism?" and the following answer choices: 
- viruses
 - leukemia
 - Pollution
 - chickenpox
 - money
 - rest
 - health
 - bacteria

Now knowing that disease has a negative impact on an organism and bacteria and Viruses Bacteria and viruses can cause diseases, choose the best answer.


 

        bacteria 