Which of the following is an example of a biological hazard?

The correct answer is an example of a biological hazard because it involves the presence of harmful microorganisms, such as bacteria, that can cause foodborne illnesses. Cross-contamination occurs when these pathogens transfer from one surface or food item to another, leading to possible contamination of food products consumed by individuals.

Understanding biological hazards is critical in food safety, as they can lead to significant health risks if not controlled. For instance, common pathogens like Salmonella or E. coli can multiply in food if proper hygiene and food handling practices are not followed, which can cause serious illness.

The other options refer to different types of hazards. Pesticides in food fall under chemical hazards as they involve harmful substances that can lead to health risks. Broken glass represents a physical hazard because it refers to foreign materials that could cause injury. Excessive cooking temperatures can be considered a process-related hazard that affects food safety, but it is not classified as a biological hazard. Therefore, recognizing and managing biological hazards, such as cross-contamination with bacteria, is essential in implementing effective food safety practices.