What is the ignition temperature of pine?

The ignition temperature of pine wood is best associated with its density, which is a crucial factor influencing how easily it ignites. The correct choice indicates that the ignition temperature corresponds to the characteristic properties of pine, particularly its density, which is typically around 640 kg/m³.

While the other options reflect various densities or properties unrelated to the ignition temperature of pine, the chosen answer aligns with standard values observed in the combustion studies of wood types, particularly softwoods like pine. Understanding this temperature is vital as it helps in predicting how and when pine will ignite under certain heat conditions, which is essential for fire behavior assessments.