The right answer is fermentation
Fermentation is a metabolic process that produces energy in the form of ATP from sugars such as glucose and in the absence of oxygen (anaerobic). We distinguish between alcoholic fermentation and lactic fermentation.
Most anaerobic organisms use fermentation to obtain chemical energy. There are different types of fermentation depending on the metabolic pathway used. Thus, we speak of alcoholic fermentation to that of ethanol production, lactic acid fermentation which generates lactic acid, acid-mixed fermentation for the production of lactic acid, ethanol and propionic acid, and fermentation. butyric acid to which it generates butyric acid.
