Which of the following is NOT a type of explosive?

An incendiary agent is a substance designed to ignite and cause fire rather than to produce an explosive effect. While incendiary agents can generate intense heat and flames, they do not create the rapid expansion of gases that characterizes explosive materials. In contrast, pyrotechnics, low order explosives, and high order explosives all involve a rapid chemical reaction that produces gas and pressure, resulting in an explosion. Understanding this distinction allows for a clearer comprehension of different types of hazardous materials and their effects, which is crucial in emergency response contexts where the identification of threats can impact safety and intervention strategies.