Which type of fire involves flammable solids such as wood and paper?

The correct answer is Class A fire because this classification specifically pertains to fires that involve ordinary combustible materials such as wood, paper, cloth, and certain types of plastics. Class A fires are primarily fueled by solid materials which can ignite and sustain a flame, making them a common type of fire encountered in residential and commercial settings.

Fires in this category are typically extinguished using water, as the cooling effect helps to reduce the temperature of the burning material below its ignition point. Understanding this classification is crucial for effective fire prevention and response strategies, as it informs which extinguishing agents and methods are most appropriate to safely handle the fire.

Class B fires involve flammable liquids and gases, Class C fires refer to electrical fires, and Class D fires pertain to combustible metals. Each of these classes requires different firefighting techniques and agents, which highlights the importance of recognizing the specific materials involved in a fire situation.