How wine is made?

Answer 1

Allowing yeast cells to turn sugar into grapes onto carbon dioxide and oxygen.
Grapes are crushed in bins and trucked to a winery. At the winery, the crushed grapes are poured into stainless steel fermenting tanks. After this, the wine-maker usually adds yeast to the Grape Juice (which digests the sugars), and the grape juice is poured into barrels, so that it can age for a few months.

Once the aging process is halfway done, the wine is moved into bottles, to age even further. After the wine finishes aging, it is shipped to the consumer.

Answer 2

You have to be more specific about what kind of wine. Generally you can say: Wine is an alcoholic beverage made from the fermentation of grape juice. The natural chemical balance of grapes is such that they can ferment without the addition of sugars, acids, enzymes or other nutrients.