What characteristic of Class A fires involves which type of materials?

Class A fires are defined by their involvement with ordinary combustibles, which primarily include materials such as wood, cloth, paper, rubber, and some plastics. These materials are characterized by the fact that they are organic in nature and can ignite easily, producing embers that can lead to further fires if not controlled properly.

The classification is significant for fire prevention and firefighting because it helps determine the appropriate fire extinguishing agents to use. For instance, water is typically effective against Class A fires as it cools the material and reduces the temperature below the ignition point. Understanding the characteristics of Class A fires is crucial for individuals in firefighting and safety to mitigate risks effectively.