To make foods such as bread, yoghurt and cheese.
It’s either carbon or hydrogen but I would definitely go with hydrogen
the answer could be breath oxygen or respond to stimuli. Hope this helps!
The correct answer is electrons.
Electron transport chain refers to an array of complexes, which mediates electrons from electron donors to electron acceptors through redox reactions, and combines the transfer of electrons with the transfer of protons through a membrane.
This produces an electrochemical proton gradient, which instigates the production of ATP. The ultimate electron acceptor in the electron transport chain is oxygen in aerobic respiration and sulfate in anaerobic respiration.