That would be climbing to higher grounds attached to a rope and it requires a buddy to belay you and keep you safe.
“A rope keeps two men or women together that only have one life …, these cannot feel strangers when a both share the same fate, good or bad” Gaston Rebuffat, French Mountaineer.
Belaying means to “hold fast” and has its origins in sailing actually. It means using a belay device to secure the rope attached to another climber when they are high off the ground to protect a possible fall.