Answer:
Mass movement erode due to the gravity.
Step-by-step explanation:
Gravity is the reason why erosion as well as deposition takes place. By the help of gravity water and also the ice moves. In mass movement the rock, soil, snow or other materials moves downwards due to the force of gravity. Erosion is a way in which dislodging of the sediments takes place which also initiates the movement. Mass movements also moves downslope, this includes, rockslides, mudflow, slumps etc. The factors are also their which affects the mass movement like, structure, permeability and also resistance.