I’d go with B. (if it’s not then C)
I’m sure the answer is early ancestor.
The answer would be B) Transfer heat.
Maybe Anxiety or reflex action of our bosy to the situation
The krebs cycle is a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats and proteins into carbon dioxide and chemical energy in the form of adenosine triphosphate.
