Fact 1: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs.

Fact 2: All reptiles produce eggs with a waterproof shell full of amniotic fluid.

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


 

       waterproof shell  