Earth's geochemical cycles remove and add materials, such as water and rock. The three main, interconnected geochemical cycles of earth are

I’m going to go with b!

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.

Oi oi oi oi oi oi  i think it is true