Yeast is a single-celled organism that belongs to the fungus family. Yeast can form naturally in various environments such as soil, water, and plant surfaces. Yeast can also be used in the production of fermented foods and beverages such as bread, beer, and wine.
In terms of its natural formation, yeast is formed through a process called budding. This process occurs when a yeast cell grows a small bud or protrusion on its surface. The bud continues to grow until it reaches a certain size and then separates from the parent cell to form a new cell.
In addition to budding, yeast can also be formed through sexual reproduction, which involves the fusion of two different types of yeast cells to form a new cell.
Overall, yeast is formed through natural processes of growth and reproduction, and its ability to ferment sugars and produce alcohol has made it a valuable ingredient in various food and beverage production processes.