Final answer:
Soil composition, vegetation density, and the type and speed of movement are used to classify different types of mass movement.
Step-by-step explanation:
The correct options to classify different types of mass movement are:
- b) Soil composition
- c) Vegetation density
- d) Type of movement and speed of movement
Soil composition is an important factor in determining the stability of slopes and the likelihood of mass movements occurring. Different soil types have different properties, such as cohesion and shear strength, which can affect the potential for mass movement.
Vegetation density plays a role in stabilizing slopes by providing root systems that bind soil particles together. Areas with dense vegetation are less prone to mass movements compared to areas with sparse or no vegetation.
The type of movement and speed of movement are key factors in classifying mass movements. Different types of mass movements, such as landslides, rockfalls, and debris flows, have distinct characteristics and behaviors. The speed of movement can vary from slow, gradual movements to rapid, destructive events.