Question

Which factors can lead to a mass movement? Check all that apply.

steep slopes
removal of vegetation
deposition
animal activity
earthquakes
undercutting of a slope

Answer 1

All of the factors you listed can contribute to mass movement. Here’s how each one plays a role:

1. **Steep slopes**: Steeper slopes are generally more prone to mass movement because gravity has a greater pull on materials that are inclined.

2. **Removal of vegetation**: Vegetation helps to stabilize soil and absorb water. When trees and plants are removed, the soil can become more susceptible to erosion and movement.

3. **Deposition**: The accumulation of material at the base of slopes can lead to increased weight and trigger mass movement, especially if the slope becomes too steep.

4. **Animal activity**: Animals can disturb the soil and vegetation, making slopes less stable and potentially leading to mass movement.

5. **Earthquakes**: Seismic activity can shake loose material and lead to landslides or other forms of mass movement.

6. **Undercutting of a slope**: This occurs when material is eroded from the base of a slope, reducing its stability and leading to potential slides or falls.

So, all of the listed factors contribute to the risk or occurrence of mass movement.