Answer:
D. Both are burned for energy.
Explanation:
I hope it helps!
It is likely to be a negative feedback. D is formed from B or C. D reduces the activity of the enzyme that converts A.
First one is A) and the second one is D)
A gut with 4 stomachs would be the one. This is often found in animals that feed on grass and other plants and need 4 stomachs to be able to process the food.
