How do fungi benefit from being able to reproduce both asexually and sexually?

Asexual reproduction is an advantage because they don't need to depend on contacting a suitable mate, or expand energy producing gametes and attractions, in order to spread .

sexual reproduction is an advantage because it enables the exchange of genetic information and produces variety in the offspring that makes them more resilient and capable of adapting to changes in their environment .

Where are they though?

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.