Which of the following is a property of Class A fires?

Class A fires are characterized by the presence of ordinary combustibles such as wood, paper, cloth, rubber, and many types of plastics. These materials are common in everyday environments and are often easily ignited. The extinguishing agents suitable for Class A fires typically involve water or foam that can cool the burning materials and suppress the fire effectively.

While the other properties mentioned in the options relate to other classes of fires—such as metals, electrical components, and flammable liquids—these do not classify as Class A. Metals are associated with Class D fires, electrical components fall under Class C fires, and flammable liquids correspond to Class B fires. Understanding the classification of fires is crucial for effective firefighting, as it guides the selection of appropriate extinguishing methods and safety precautions.