Which of the following are the three states that hazardous materials may occur in?

Hazardous materials can exist in three primary physical states: gas, liquid, and solid. Understanding these states is crucial for hazardous materials management because each state presents unique risks and requires different handling and mitigation strategies.

In the gaseous state, hazardous materials can spread quickly and may pose inhalation risks. Liquids can spill and contaminate the environment, while solids can be harmful through direct contact or as a source of particulate matter. Recognizing the state of a hazardous material helps responders to determine the appropriate protective measures and response actions needed to ensure safety during an incident.

Other options reflect different concepts or categories related to hazardous materials but do not address the physical states in which these materials occur.