Respuesta :
Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol. It occurs in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
The chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and giving off that heat.
No choices given so here is the definition.
No choices given so here is the definition.