You are presented with the question "what has a negative impact on the body?" and the following answer choices: 
- pathogens
 - electrons
 - smallpox
 - amoebae
 - vitamins
 - lungs
 - viruses
 - smoking

Now knowing that disease-causing microbes have a negative impact on the body and pathogens are microbes that cause disease, choose the best answer.


 

 pathogens        