What is scarification, and how does it relate to mass movement? Give several examples of scarification. Why are humans a significant geomorphic agent? Name and describe the type of mudflow associated...

What is scarification, and how does it relate to mass movement? Give several examples of scarification. Why are humans a significant geomorphic agent?

Name and describe the type of mudflow associated with a volcanic eruption. Describe the difference between a landslide and what happened on the slopes of Nevado Huascarán.