Which type of biohazard includes parasites?

The correct choice highlights that parasites are categorized as living organisms that rely on hosts for survival and reproduction. Parasites, by definition, benefit from their relationship with a host organism, often causing harm in the process. This interaction is essential for their lifecycle, making them distinct from other biohazards that may not rely on a living host.

Pathogenic bacteria, while a significant health concern, refer specifically to harmful bacteria that can cause disease but do not include parasites. Spoilage bacteria typically lead to food deterioration and are not necessarily harmful to human health. Molds and yeasts are types of fungi that can spoil food but do not fall under the definition of parasitic organisms. Thus, identifying parasites as living organisms using hosts clarifies their role in food safety and public health, which encompasses the broader implications of biohazards as they relate to human consumption.