It’s D (example a turtle draws its head back into its shell when it’s shell is touched) I’d say it’s kinda of the same as odor (if u already answered it then dang)
Number 5 is A plants. Fossils of ancient reptiles have been called Cynognathus and Mesosaurus have been found on South America and Africa.
They use specialized cell organelles to maintain homeostasis because they don't have an entire organism that does it, so they have to do everything all by themselves.
