What three types of microbes have a positive use in food preparation?

There are three types of microbes that have a positive use in food preparation: yeast, bacteria, and molds.1. Yeast: Yeast is a type of fungus that is commonly used in baking and brewing. It ferments sugars, producing carbon dioxide and alcohol, which causes bread to rise and gives beer and wine their alcoholic content.2. Bacteria: Certain types of bacteria are used in the production of fermented foods such as yogurt, sauerkraut, and kimchi. These bacteria ferment sugars and produce lactic acid, which acts as a natural preservative and gives these foods their distinctive tangy flavor.3. Molds: Molds are a type of fungus that are used in the production of certain cheeses, such as blue cheese and Roquefort. The mold grows within the cheese, producing compounds that give it its distinctive flavor and veiny appearance.