You are presented with the question "Mold spores have what impact on breathing?" and the following answer choices: 
- neutral
 - ambiguous
 - symptoms
 - motility
 - positive
 - dangerous
 - negative
 - uncontrolled

Now knowing that amold spore has a negative impact on the respiratory system and insects also have both a heart and a respiratory, or breathing, system, choose the best answer.


 

       negative  