Which of the following is considered a "forbidden" material for transport?

The option indicating explosives is considered a "forbidden" material for transport because explosives pose significant safety risks during transit. They can easily be detonated by heat, shock, or pressure, leading to catastrophic accidents. Regulations surrounding the transportation of hazardous materials are in place to ensure public safety, and these materials are typically subject to strict controls, including special licensing and handling requirements. Therefore, transporting explosives without adhering to these regulations is strictly prohibited.

In contrast, food products, household items, and clothing materials typically do not carry the same inherent risks associated with explosives and are generally permitted for transport as long as they meet guidelines set forth by relevant authorities.