Select from the following. +layer of body fat under skin +A compound that donates proton +Molecular kinetic energy +mineral particles and organics +a complete digestive system +converting food to energy +keeping food fresh for long periods of time +Something made primarily of oxygen and nitrogen
Q: You are presented with the quiz "What does an animal require for survival?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "an animal requires air for survival" and "air is primarily oxygen and nitrogen". So, what's the best answer to the question?
A:
Something made primarily of oxygen and nitrogen