What command is used for less tension on the rope indicated by the rescuer to the belayer?

The command used for less tension on the rope, indicated by the rescuer to the belayer, is "Slack." When a rescuer says "Slack," it communicates the need for the belayer to give some rope length, loosening the tension. This is often necessary in scenarios where the rescuer wants to create more comfort for the climber, adjust positioning, or allow for increased movement without the restriction of tight rope tension.

This command is particularly important in climbing and rescue operations, as it helps maintain safety and ensures smooth maneuvers without causing undue stress on either the rescuer or the climber. Adjusting the tension in this way can prevent injuries and make the rescue process more efficient. In contrast, other commands such as "Stop," "Hold," and "Release" relate to maintaining or stopping tension rather than reducing it.