Final answer:
Clay is the correct answer as it can facilitate mass wasting due to its cohesive properties when mixed with water, which may lead to the weakening of slopes and potential landslides.
Step-by-step explanation:
Clay is a facilitator of mass wasting. Over time, the earth's crust undergoes various processes like melting, moving, squeezing, cracking, and being pounded by weather, resulting in different layers including clay. Clay's fine particles, such as silt, which consists of feldspar, silica, and alkalis like iron, grant it plasticity and cohesion when water is added. This property enhances its ability to facilitate mass wasting as it can weaken slopes and lead to landslides or other forms of mass movement.