what are microorganisms

Microorganisms, also known as microbes, are organisms of microscopic size, which may exist in single-celled form or as a colony of cells. They can be bacteria, fungi, archaea, or protists, and they are found in water, soil, air, and the human body. Microorganisms are essential for various processes such as food production, waste treatment, and maintaining soil fertility. They are also used in biotechnology, research, and the production of various chemicals and enzymes. Some well-known examples of microorganisms include bacteria, viruses, and fungi