1) Type of climbing 
Free climbing is a specific rock climbing term that was created in contrast with aid climbing. It refers to climbs in which climbing protection such as ropes, tri-cams, nuts, and other aid-climbing equipment, may be used to protect against injury during falls, but cannot be used in ascending the climb. The term free climbing originally meant `fre....
Free climbing (also known as free from direct aid climbing) describes any type of climbing that does not use climbing equipment to help the climber progress in their climb; however with free climbing, equipment is allowed purely for safety reasons.
placing gear to prevent the climber hitting the ground