Because, without them, the dead animal will just sit there. So, having decomposers gets rid of the remains of the animal, and that way they can eat too. Hope it helps good luck!
Folds, wrinkles, etc!
by folding the membrane of an organelle, surface area is optimized while volume remains the same. that is why mitochondria looks folded on the inside when you see pictures of it. the higher the surface area to volume ratio, the more efficient the organelle.
Electricity could be discovered using batteries based on zinc or lead, but without copper wiring it would remain little more than a scientific curiosity. Electric motors and generators require large amount of wiring, so they are impossible to build on large scale in this world
