So, the expedition team ties the ropes through which they can drag anyone in case of a fall to cross these crevasses.
The cracks that appear in glacial ice and can even swallow climbers are crevasses. Khumbu icefalls and western Cwm are the areas with high crevasses. Therefore, a slight carelessness in this highly sensitive area may take the life of the climbers. So, the expedition team ties the ropes through which they can drag anyone in case of a fall to cross these crevasses. So crevasses also act as a difficult factor while climbing Mount Everest.