Which of the following is an example of a Class A fire?

A Class A fire is one that involves ordinary combustible materials. These materials typically include solids such as wood, paper, textiles, and certain plastics. In this context, wood is a quintessential example, as it readily burns and produces ashes when ignited, which is characteristic of Class A materials.

In contrast, other options involve different categories of fire. Gasoline is a flammable liquid that falls under Class B fires, which are fueled by liquids and gases. Electrical appliances represent Class C fires, as they involve live electrical equipment. Greases and oils, particularly in a cooking context, can lead to Class K fires, which are specific to cooking media. Understanding these distinctions is crucial for effective fire safety management and appropriate fire suppression techniques.