Which is NOT a way hazardous materials can enter the human body?

The correct answer, which identifies a method that does not allow hazardous materials to enter the human body, is related to the concept of how substances can be absorbed or come into contact with the body. Inhalation, injection, and ingestion are all recognized pathways through which hazardous materials can enter the body; inhalation involves breathing in harmful substances, injection refers to direct introduction of a substance into the bloodstream or tissue, and ingestion pertains to consuming harmful substances through eating or drinking.

In contrast, empathy, which involves understanding and sharing the feelings of others, does not constitute a physical pathway for hazardous materials to enter the human body. This choice stands out because it pertains to emotional and psychological processes rather than biological or physiological interactions, making it clear that it is not a method through which materials can be absorbed. Understanding these methods is crucial for first responders and healthcare professionals when assessing risk and implementing safety measures regarding hazardous materials.