Fact 1: Amphibians are the first true tetrapods, or vertebrates with four limbs.

Fact 2: All frogs are amphibians.

Given the two facts above, answer the question "The first tetrapods were" with the following options: 
- major threat to health
 - remains of prehistoric life
 - in the frog family
 - running and lifting
 - competing for resources
 - warm-blooded
 - objects that have mass
 - graptolites


 

   in the frog family      