Fact 1: If an animal lives under ground then that animal will be protected from a wild fire.

Fact 2: Fire heat can kill.

Given the two facts above, answer the question "What can living underground keep animals from being?" with the following options: 
- Gravity
 - killed
 - smart
 - deadly
 - leeches
 - dark
 - streams.
 - safe


 

  killed       