Respuesta :
carbon cycle is the answer, yes it is the answer indeed just trust me on this one bruh im in AP Bio. Bro AP Bio exam was last monday, i highkey think i got a 5 vro, know what im sayin. Carbon is being taken in by the plants to produce then oxygen is released, then that oxygen is used for electrons and hydrogen ions for the electron transport chain (oxidative phosphorylation).That is why the answer is A) Carbon Cycle.
This is FLVS Biology 1, I take the same class. the answer is The Carbon Cycle