If an animal lives under ground then that animal will be protected from a wild fire, and marmots live in underground burrows. Given these facts, why are marmots protected from wild fire among the following options:
- They're in water
 - an external framework
 - water conservation
 - hard outer covering
 - They don't live near fire
 - They're underground
 - They're fireproof
 - important habitats


 

      They're underground   