D is the answer to the question
Exhaled air has more carbon dioxide because the blood contains some carbon dioxide (a waste product) that is transferred to the air in the lungs, which is then exhaled. The result is that the exhaled air contains less oxygen and more carbon dioxide than the inhaled air. The air in the lungs also becomes humidified with water before it is exhaled.
I think it’s Ribosomes but I could be wrong .. if so sorry
Absence of oxygen
fermentation is an anaerobic (meaning doesn't require oxygen) process
