Rock-climbing, also known as mountaineering, is an adventurous activity where climbers ascend rocky terrains. It requires physical strength, agility, and mental focus to climb and conquer challenging heights and obstacles. Another synonym for rock-climbing is bouldering, which focuses on low-height climbs without using ropes or harnesses. Free climbing, on the other hand, refers to rock-climbing without any use of tools or devices except for shoes and chalk. Trad climbing or traditional climbing involves placing protective gear while ascending and removing it as they go higher. Sport climbing is a type of mountaineering that involves fixed anchors called bolts or pitons to secure the climber's safety. Lastly, there's deep-water soloing, where climbers climb deep waters and fall off into safe waters below.