What type of bacteria are known to cause diseases such as strep throat?

Pathogenic bacteria are the correct response because they are responsible for causing diseases and infections in humans. These bacteria can invade tissues, evade the immune system, and produce toxins that lead to illness. For instance, Streptococcus pyogenes, which causes strep throat, falls under the category of pathogenic bacteria.

In contrast, non-pathogenic bacteria are generally harmless and do not cause disease. Beneficial bacteria contribute positively to human health by aiding in digestion or protecting against pathogens. Probiotic bacteria are a subset of beneficial bacteria that are often used in supplements and food to promote gut health. While all the other categories are essential in their own right, they do not directly relate to the cause of infectious diseases like strep throat, making pathogenic bacteria the correct choice in this context.