The existance of microbes was confirmed by:

Explanation

Louis Pasteur was the scientist who is credited with definitively proving the existence of microbes. In the mid-19th century, Pasteur conducted a series of experiments that demonstrated the role of microorganisms in fermentation, putrefaction, and disease. His work laid the foundation for the field of microbiology and led to the development of many important medical and industrial applications, such as vaccines and pasteurization.