How is Earth's surface most likely to change in a place that experiences extensive animal activity? Sand dunes will be formed due to deposition of sediments.

Soil will loosen due to vast network of underground tunnels.

Cracks will appear in rocks due to freezing and thawing of water.

Rocks will break due to repeated abrasion and mechanical stress.

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.