They should be carbohydrates, fats (lipids) and protein. they are labelled as primary food substances and they're essential to life. they can provide energy and raw material for life processing. although mineral ions and vitamin are important too, but they only need a small amount.
Anything below 165 degrees I believe. (At least that's what it is for a chicken breast which I would think would be the same thing. Let me know if not.) :)
Blood sugar, body water, body temperature, and blood oxygen.
The answer is C, not likely to heal and bats usually die from them