You are presented with the question "What has a negative impact on the body?" and the following answer choices: 
- photons
 - exposure to cold
 - abundant food
 - influenza orthomyxoviruses
 - disease-causing organisms
 - smallest agents of disease
 - rocks
 - a tree falling

Now knowing that disease-causing microbes have a negative impact on the body and microbes are microscopic, single-celled organisms without a nucleus, choose the best answer.


 

     disease-causing organisms    