How is gravity involved in the erosion of earths surface by mass movement?

Gravity plays a key role in mass movement erosion by pulling rock and soil down slopes. When gravity overcomes the resistance of friction and cohesion holding the material in place, mass movement processes like landslides, rockslides, and mudslides occur. Gravity acts as the driving force that causes the material to move downslope, shaping and reshaping the Earth's surface over time.