Final answer:
Mass movement can be classified based on various factors, such as the type of material involved, the speed of movement, and the nature of the mass. The angle of repose is one of the factors used to classify mass movement.
Step-by-step explanation:
Mass movement refers to the downhill movement of rock, soil, and debris under the influence of gravity. It can be classified based on various factors, such as the type of material involved, the speed of movement, and the nature of the mass. One of the factors used to classify mass movement is the angle of repose. The angle of repose is the steepest angle at which a pile of unconsolidated material remains stable, without sliding down. Different types of mass movement occur at different angles of repose.