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

The correct choice, which is 'Distribution,' is not considered a route of exposure to hazardous materials.

When discussing hazardous materials, routes of exposure refer to the specific ways in which these materials can enter the body. Inhalation involves breathing in airborne hazardous substances, while absorption includes the entry of materials through the skin or mucous membranes. Injection refers to the direct introduction of substances into the body through punctures, typically with needles.

Distribution, on the other hand, refers to how a substance spreads within the body after it has entered via one of the established routes of exposure. It does not describe a method of exposure itself, but rather a process that occurs after exposure has already taken place. This is why it is not classified as a route of exposure.