You are presented with the question "Amphibians with what are more advanced than fish?" and the following answer choices: 
- four eyes
 - sensory neurons
 - rapid expansion
 - layers of fat
 - four limbs
 - kinetic energy
 - tails
 - many limbs

Now knowing that amphibians are the first true tetrapods, or vertebrates with four limbs and all vertebrates more advanced than fish have four limbs, each with up to five fingers or toes, choose the best answer.


 

     four limbs    