Which change is an example of maintaining dynamic equilibrium?

Homeostasis   is  an  example  of   dynamic   equilibrium. Dynamic  equilibrium   is  a state   of  balance  that  is  achieved  within  a  environment   due  to  internal  control  mechanism   that  oppose  outside  force that  attempt  that  environment.Homeostasis  is  responsible  in in   maintaining  a constant  internal  environment  in  the  body  of  living  organism.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.