Answer:
When sugars turn into ethyl alcohol, (beer, wine, ect.)
Explanation:
"fer·men·ta·tion
- the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat.
- the process of fermentation involved in the making of beer, wine, and liquor, in which sugars are converted to ethyl alcohol.
"
-Google dictionary
