Fact 1: Viruses are usually considered to be nonliving.

Fact 2: Viruses Viruses are the smallest agents of disease.

Given the two facts above, answer the question "What is considered nonliving?" with the following options: 
- Leptospirosis
 - major threat to health
 - smallest agent of disease
 - harmful substances
 - direct damage to the lungs
 - Food poisoning
 - an area swollen with pus
 - loses an electron


 

   smallest agent of disease      