How can rappelling be safely performed during a rescue?

Rappelling safely during a rescue is fundamentally dependent on using proper techniques and equipment to control the descent. This means securing the rappel rigging with appropriate knots and harnesses, understanding the weight limitations of the equipment being used, and maintaining stable communication among team members throughout the operation. Employing correct techniques ensures that the individual descending maintains control, can manage any unforeseen circumstances effectively, and can respond to emergencies such as a sudden halt or a need to adjust descent speed.

Using the right equipment also includes employing harnesses, carabiners, rappel devices, and backup safety systems, which are all critical components that contribute to the safety and stability of the operation. Relying solely on physical strength would not provide the necessary control or safety margins that specialized equipment and techniques offer. Moreover, descending quickly can increase the risk of accidents, and using loose knots could lead to equipment failure or loss of control. Therefore, option B encapsulates the essential principles of safe rappelling by emphasizing the importance of technique and equipment in enhancing safety during rescue operations.