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

Fact 2: Bullfrogs eat other amphibians.

Given the two facts above, answer the question "These belong to the class of creature that were the first true tetrapods:" with the following options: 
- millipede
 - crabs
 - four limbs
 - bullfrogs
 - gastropod
 - a fish
 - warm-blooded
 - insects


 

    bullfrogs     