How do i use a food web to indentify organisms from different trophic levs

Level 1: primary producer(plants and other organisms that primarily acquire energy from natural forces(geothermal in deep ocean ecosystem, solar energy on earth surface))

Level 2 herbivores, consume level 1 organisms as the main source of energy

Level 3 carnivores that eat level 2 organism as the primary source of energy

Level 4 and 5(if the base of the food web is large enough) Apex carnivores who consume mostly level 3 and sometimes level 2 organisms for food.

From level 1 to level 4, 5, each level has 1/10 number of organisms than the lower level because only 1/10 of whatever they eat convert to their body mass, so there need to be 10 times more prey than predator for the higher level to not starve to death and for the food web to be sustainable.

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.