B. A form of energy coupling refers to using the release of energy from exergonic hydrolysis of ATP to initiate other endergonic reactions for cellular metabolism.
Answer:
b
Explanation:
it is a 4 on the scale, I assume that's what you meant by the numbers.
The excretory system is most likely to respond when an animal is thirsty in this way: B. by retaining body fluids.
Because the body doesn't get enough fluids to not be thirsty anymore, it retains whatever fluids it already has in it until the thirst is satiated.
