Scrambling = a walk up steep terrain involving the use of one’s hands
Wikipedia: It is an ambiguous term that lies somewhere between hiking, hillwalking, mountaineering, and rock climbing.
Bird and Hike: Class, which refers to the technical difficulty of a route, ranges from Class 1 (walking on a well-maintained trail) to Class 6 (hanging from climbing gear while using engineering skills to ascend a cliff). The phrase Hiking implies Class 1 or Class 2 (generally not needing hands for stability). The phrase Scrambling implies Class 3, Class 4, or minimal Class 5 (generally needing hands for stability, but not ropes for safety)