Classification is subject to change because science is an evolving subject. New things are discovered every year and thus changing the way we understand the world around us.
        
             
        
        
        
Normally, oxygen from the blood cells supply your muscles with the energy it needs to carry out certain actions. However, when there isn't enough oxygen to support the muscles, it produces lactic acid, or fermentation, to make up for the oxygen. (That's why you get that burn-y feeling whenever you exercise!)
 
        
             
        
        
        
Answer:
The correct answer is: homeostasis.
Explanation:
Homeostasis is the state in which an organism maintains its internal conditions so it can function properly. If homeostasis fails, diseases appear.
In order to maintain homeostasis, there are many conditions that are regulated regularly, from <u>body temperature to pH, and fluid balance</u>. For homeostasis to be maintained, different systems participate in the regulation of these conditions.
The example provided in the question is a process performed by many structures in different organs that help regulate the concentration of fluids.
 
        
             
        
        
        
Answer:
This is a 50/50 answer. I believe it would be fox, sorry if this is incorrect.
 
        
                    
             
        
        
        
Adrenaline, Cortisol, Norepinephrine.