The mountain and its risk It will depend on the type of mountain to climb, and the season of the year...
Mountaineering techniques vary greatly depending on location, The everest is very different compare to The Aconcagua, also season, and the particular route a mountaineer chooses to climb.
Mountaineers train to climb on all types of terrain whether it be snow, glacier, glacial Ice, water ice, or rock. The challenges appear in all different kinds.
Each type of terrain presents its own hazards. Always Safety is first. Climbers must be skilled in dealing with the different challenges that could arise from different terrain.