Which of the following is NOT a type of biological hazard source?

The identification of chemicals as not being a type of biological hazard source is rooted in the definitions of biological hazards. Biological hazards, often referred to as "biohazards," are typically microorganisms like bacteria, viruses, fungi, and parasites that can pose risks to human health. These hazards can originate from various biological sources including animals, plants, and human blood or bodily fluids, all of which can harbor pathogens or toxins.

Chemicals, while they can pose significant health risks and hazards, do not fall under the category of biological hazards. Instead, they are classified as chemical hazards. This classification underscores the distinction between hazards stemming from living organisms or their products and those arising from synthetic or naturally occurring chemical substances.

By understanding this classification, it becomes clearer how safety training focuses on preventing exposure to different types of hazards based on their nature—biological, chemical, physical, etc.—thus ensuring a comprehensive approach to workplace safety and health.