Which of the following statement describes a difference between birds and reptiles? Birds look like their parents after hatching and reptiles do not.
Reptiles look like their parents after hatching and birds do not.
Baby birds are fed and protected by their parents and reptiles are not
Reptiles are fed and protected by their parents and birds are not.

your answer is most likely the third...  Baby birds are fed and protected by their parents and reptiles are not :)

let me know if i'm wrong, but have a great day!

atp is used for energy.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.