What harm is associated with exposure to biological materials?

The correct answer addresses harm related to the biological agents involved. When individuals are exposed to biological materials, they can encounter pathogens that have the potential to cause diseases in living organisms. This includes bacteria, viruses, fungi, and parasites, which are fundamentally linked to various infectious diseases. The term "etiologic" is directly related to the causative agents of these diseases, emphasizing how specific biological materials can lead to health issues when introduced into a living system.

Each of the other options, while they relate to biological contexts, don't specifically capture the primary harm associated with exposure. For example, "infection" refers to the outcome of exposure but doesn't point to the underlying causes as "etiologic" does. "Invasive" refers to the nature of certain pathogens that invade tissues, which can lead to serious health challenges, but it is not a broad term describing the harm itself. "Decomposition" pertains to the breakdown of organic matter, which can occur after biological materials are no longer alive, but it doesn't highlight the immediate health risks posed by exposure.