The downslope movement of a body of material made up of soil, sediment, or rock propelled by the force of gravity is known as:

Answer: Mass movement

Explanation: Mass movement is the natural process that occurs under the gravity force causing soil, sand, rocks to move in the downward motion in a slope in the form of solid mass. This process is also known as the mass wasting. along with mass movement, there is also the flow of debris and mud. It is usually caused by the climatic condition on the Earth's surface.