Which of the following is a biological food hazard?

Parasites are considered a biological food hazard because they are living organisms that can contaminate food and cause illness in humans. Biological hazards include any pathogens — such as bacteria, viruses, and parasites — that can multiply in food under the right conditions. When ingested, parasites can lead to various health issues, including gastrointestinal distress and more severe illnesses.

Understanding biological hazards like parasites is crucial for food safety, as they often do not alter the taste, smell, or appearance of food, making them particularly insidious. Therefore, proper food handling, cooking, and storage practices are essential to prevent their spread and ensure food safety. This contrasts with the other options, which represent physical or chemical hazards rather than biological ones.