Which of the following is a class of wire used in a defense?

Protective wire is a class of wire used in defense that serves as a means of fortification against unauthorized entry and enhances security in military operations. This type of wire is often deployed in the form of barbed wire or concertina wire, which can be strategically placed around perimeters to create barriers that deter intruders and protect personnel and assets. Protective wire is essential for establishing defensive perimeters in combat or operational zones, providing both physical deterrents and psychological advantages by presenting obstacles to potential aggressors.

The other options refer to different concepts and functions. Combat wire typically describes wire used in specific tactical scenarios but does not encapsulate the broader category of security that protective wire encompasses. Supply wire is generally associated with logistical and supply chain management rather than direct defense functions. Utility wire refers to electricity and communication needs and does not pertain directly to the fortification or protective layers required in defense scenarios. Understanding these distinctions highlights the relevance and importance of protective wire in military strategy and defense operations.