How does one make wine?

The most standard answer to this concern is that red wine is made by fermentation. Grapes are crushed and their juice is allowed to ferment, typically with the addition of yeast.  Learn More The yeast consumes the sugars in the grape juice and convert them into alcohol. There are, naturally, a lot more details associated with making white wine.

White red wine is made by squashing the grapes and separating the juice from the skins prior to fermentation. Red wine is made by crushing the grapes and permitting the skins to remain in contact with the juice during fermentation.

There are lots of various types of white wine, and the details of how they are made vary depending on the style of white wine being produced.  https://bikramyogauk.net/?p=565 In basic, though, red wine is made by fermentation of grape juice.