Which of the following risks can be classified as a biological hazard?

Biological hazards consist of organisms or substances derived from them that can pose a threat to human health. This category includes a variety of pathogens such as bacteria, viruses, fungi, and parasites. The presence of bacteria and viruses can lead to infections and diseases, which is why they are classified under biological hazards.

Understanding this classification is crucial in fields like environmental health and food safety because it aids in implementing appropriate measures to prevent exposure and control outbreaks. For instance, effective sanitation practices and food handling procedures are vital to minimize the risks posed by these biological agents, further emphasizing their significance in public health contexts.

The other options—glass fragments, pesticides, and chemicals—represent physical and chemical hazards rather than biological ones. These can certainly pose significant risks in various scenarios, but they do not fall under the biological hazard category.