Name a common biological hazard in sanitation practices.

A common biological hazard in sanitation practices is bacteria such as E. coli. This organism is often associated with contaminated food and water and can lead to severe gastrointestinal illnesses. E. coli is particularly dangerous because it can multiply rapidly in suitable environments, especially when sanitation practices are inadequate. Proper sanitation practices aim to eliminate or control biological hazards such as bacteria, ensuring that food and water sources remain clean and safe for consumption.

The other options, while posing risks in sanitation and hygiene, fall into different categories. Pesticides are chemical hazards that can contaminate food and water but do not stem from biological sources. Heavy metals, like lead or mercury, are also chemical hazards that can accumulate in the environment and pose health risks. Asbestos is associated with respiratory hazards due to inhalation of fibers, not directly linked to biological sanitation risks. Understanding the distinction between these categories helps in identifying and mitigating various types of hazards in sanitation practices.