Which of the following is not typically considered a light fire fuel?

Heavy timber is not typically considered a light fire fuel because it consists of large-diameter wood that burns slower and contributes to longer-lasting, more intense fires. Light fire fuels usually include smaller, more combustible materials that ignite easily and produce quick, intense flames. These materials, like grass, leaves, and kindling, are characterized by their low moisture content and fine structure, which allows for rapid ignition and combustion. In contrast, heavy timber requires more heat to ignite and does not catch fire as quickly, categorizing it as a heavier fire fuel. Understanding the differences in fire fuel types can help firefighters make informed decisions during firefighting efforts and when assessing fire behavior.