You are presented with the question "_ are tetrapods." and the following answer choices: 
- animals
 - amoeba
 - Frogs
 - Length
 - insects
 - Spiders
 - Snakes
 - Birds

Now knowing that amphibians are the first true tetrapods, or vertebrates with four limbs and frogs are classified as amphibians, choose the best answer.


 

   Frogs      