9. What organism is found in freshwater habitats and can infect a person if they
   C. diff
   Hepatitis
   Influenza

The organism commonly associated with freshwater habitats that can infect humans is Naegleria fowleri, a type of amoeba. While not one of your listed options, it’s important to note that this organism can cause a severe brain infection known as primary amoebic meningoencephalitis (PAM) when water contaminated with the amoeba enters the body through the nose, usually during swimming in warm freshwater.

Additionally, while C. diff (Clostridioides difficile), hepatitis viruses, and influenza viruses affect humans, they thrive in different environments. For instance, C. diff often resides in the intestines and can cause severe gastrointestinal issues, usually following antibiotic use or in healthcare settings, while hepatitis primarily spreads through contact with infected fluids. Understanding the habitats and transmission modes of these organisms helps in prevention and treatment efforts!