Question

why are yeasts used to make wine and bears ​

Answer 1

in the absence of oxygen yeast converts the sugar in wine into alcohol and carbon dioxide through the process called fermentation and hence they are used

Answer 2

Answer:

The role of yeast in winemaking is the most important element that distinguishes wine from grape juice. In the absence of oxygen, yeast converts the sugars of wine grapes into alcohol and carbon dioxide through the process of fermentation.