Which symbol denotes a Type D fire that involves combustible metals?

The symbol that denotes a Type D fire, which involves combustible metals, is the yellow star. Type D fires are specific to combustible metals such as magnesium, titanium, and sodium, and they require special extinguishing agents suitable for these materials, as regular fire extinguishers may not be effective. The yellow star effectively communicates the unique hazards associated with these types of fires to first responders and those working in environments where combustible metals are present. This specific color and shape help distinguish it from symbols representing other classes of fires, such as those involving organic materials, flammable liquids, or electrical fires, which are depicted with different symbols. A yellow star visually indicates the need for caution and specialized handling when dealing with combustible metal fires.