Achild has a sore throat. the mother takes the child to the doctor. the doctor says that the child has a bacterial infection.

explain how the infection makes the child ill.

There is good bacteria but in this case that might be bad bacteria and that can spread and cause harm to the child

Predator instincts is what causes it

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.