Which of the following microorganisms can cause foodborne illness?

All of the listed microorganisms—fungi, viruses, and parasites—can lead to foodborne illnesses, making "All of the above" the correct answer.

Fungi, such as molds and certain mushrooms, can produce mycotoxins which may cause illness when ingested. Viruses like Norovirus and Hepatitis A are also significant contributors to foodborne illnesses, often spread through contaminated food and water, or by improper handwashing among food handlers. Additionally, various parasites, including Giardia and Trichinella, are capable of contaminating food and leading to health issues when consumed.

Understanding that all three types of microorganisms can cause foodborne illnesses emphasizes the importance of proper food handling, storage, and preparation techniques to ensure food safety.