A pressurized water extinguisher would be chosen to extinguish a _________ fire.

A pressurized water extinguisher is specifically designed for Class A fires, which involve ordinary combustible materials such as wood, paper, and cloth. These types of fires are fueled by materials that can absorb water, making it an effective extinguishing agent. When water is applied to a Class A fire, it cools the burning material, reducing the temperature below the ignition point and removing the heat component of the fire triangle.

Using a water extinguisher on other classes of fires would not be safe or effective. For instance, Class B fires involve flammable liquids, and using water could spread the fire instead of extinguishing it. Class C fires are electrical fires, and applying water could create a risk of electrical shock. Lastly, Class D fires involve combustible metals, which can react violently with water. Therefore, a pressurized water extinguisher is appropriate only for extinguishing Class A fires.