Nivin was observing his mother making wine using grapes. He saw that she is adding some amount of yeast into it. What do you think, what will be the reason for using yeast?

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Solution

Alcohol fermentation:
Yeast uses sugar to produce alcohol and carbon dioxide in the absence of oxygen through a process called fermentation.
Sugar is present in the grapes that Nivin's mother is using to produce wine.
Yeast is used in wine production to produce the alcohol from the sugar present in grapes.

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