Which type of material generates more heat per pound than common combustibles?

Plastic is the correct answer because, when combusted, it produces a higher heat release rate per pound compared to common combustibles like wood, paper, and textiles. The chemical composition of plastics includes hydrocarbons, which, when burned, release significant energy. This characteristic makes plastics potentially more hazardous in fire situations, as they can contribute to faster spreading of flames and higher temperatures.

While wood, paper, and textiles also burn and release heat, their combustion typically produces less energy per unit mass than plastics. Understanding the heat release characteristics of different materials is crucial for effective fire protection and safety measures.