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

Fact 2: All vertebrates more advanced than fish have four limbs, each with up to five fingers or toes.

Given the two facts above, answer the question "Amphibians with what are more advanced than fish?" with the following options: 
- four eyes
 - sensory neurons
 - rapid expansion
 - layers of fat
 - four limbs
 - kinetic energy
 - tails
 - many limbs


 

     four limbs    