Which of the following is NOT a route of exposure to hazardous materials?

• A. Inhalation
• B. Symbiosis
• C. Absorption
• D. Injection

Answer: (B)

Symbiosis is a term that refers to a close and often long-term interaction between two different biological species, which is not relevant when discussing exposure routes for hazardous materials. In contrast, inhalation, absorption, and injection are all recognized pathways through which individuals can come into contact with hazardous substances.

Inhalation involves breathing in harmful gases, vapors, or aerosols, while absorption can occur through the skin when hazardous materials come into contact with it. Injection refers to the introduction of hazardous materials directly into the body, typically via a puncture wound. These exposure routes are critical for understanding how hazardous materials can affect human health and safety, highlighting the importance of protective measures in environments where such materials are present.