Which type of fire involves ordinary combustibles such as textiles and wood?

The correct choice refers specifically to Class A fires, which involve ordinary combustibles. This includes materials such as wood, paper, fabric, and other similar substances that can sustain combustion. Class A fires are commonly encountered in everyday environments, such as homes, offices, and various workplaces, making it vital for fire protection personnel to be trained in how to effectively extinguish these types of fires.

In the classification of fires, Class A is distinct because it focuses on solid materials typically found in most settings. The extinguishing agents for Class A fires usually include water, which cools the burning material, or other agents that can smother the fire. Understanding this classification helps fire protection teams identify the appropriate methods and materials needed to combat and safely extinguish these fires.