Which of the following is NOT a responsibility of workers using the buddy system?

The correct choice pertains to the fact that while the buddy system emphasizes safety and support during hazardous operations, forming a close friendship with the partner is not a necessary component of that system. The purpose of the buddy system is to ensure that workers remain vigilant and attentive to each other's safety, particularly in potentially hazardous environments.

Remaining in close visual contact with a partner, observing for signs of heat stress or other difficulties, and providing assistance when needed are all critical responsibilities that directly contribute to worker safety. However, fostering a close personal friendship, while it may happen naturally, is not mandated or crucial to the effectiveness of the buddy system in emergency response or hazardous work situations. The primary focus should always be on safety, communication, and immediate response capability, rather than on personal relationships.