I think it's C. Because hibernation is usually for animals living in Continental climates. I basically just eliminated the other answers until I got that one. One example for animals living in cold climates burrowing are Arctic Foxes.
D)Oxygen diffuses from alveolar sacs to blood in capillaries
Fossils have animals, plants and living organisms imprinted into them, it helps us understand what lived and thrived in certain environments. The age of the rock can also help you understand when that thing lives.I hope this helps!
