Fact 1: Viruses infect and live inside the cells of living organisms.

Fact 2: Humans are complex organisms.

Given the two facts above, answer the question "what do viruses live inside the cells of?" with the following options: 
- animals
 - gravity cells
 - battery cells
 - goats
 - cows
 - weather cells
 - humans
 - plants


 

       humans  