Where is yeast found?

Yeast is a type of fungus that is commonly found in nature, and can be found in a wide range of environments such as soil, plants, and bodies of water. It is also commonly used in baking and brewing processes, where it is added to dough or wort to aid in the fermentation process. Yeast can also be found on the surface of fruits, such as grapes, where it plays a critical role in the fermentation of wine. Additionally, yeast can be found in the digestive tract of many animals, including humans, where it helps with the digestion of food.