You are presented with the question "Reptiles are a class of tetrapod vertebrates that produce eggs with a what?" and the following answer choices: 
- kinetic energy
 - Chemical energy
 - the body's largest organ
 - heat energy
 - Epidermis
 - epidermis and dermis
 - waterproof shell
 - rapid expansion

Now knowing that reptiles are a class of tetrapod vertebrates that produce amniotic eggs and all reptiles produce eggs with a waterproof shell full of amniotic fluid, choose the best answer.


 

       waterproof shell  