What are 4 ways that bacteria are helpful to humans?

Bacteria play a vital role in human health and the environment in several ways. Firstly, they aid digestion by breaking down complex carbohydrates in the gut, producing essential nutrients and vitamins. Secondly, beneficial bacteria help protect against harmful pathogens by outcompeting them for resources. Additionally, bacteria are used in biotechnology for producing antibiotics, vaccines, and fermented foods, enhancing food preservation and nutrition. Lastly, they contribute to bioremediation, helping to clean up pollutants in the environment.