Landslides can be triggered by factors such as:

The correct answer is D. Landslides can be triggered by factors such as heavy rainfall, earthquakes, and human activities (e.g., construction).

• Heavy rainfall can cause landslides by increasing the weight of the soil and making it more likely to slide.
• Earthquakes can cause landslides by shaking the ground and loosening the soil.
• Human activities, such as construction, can also cause landslides by removing trees and other vegetation that help to hold the soil in place.

Landslides can be a serious hazard, causing damage to property and infrastructure, and loss of life. It is important to be aware of the risks of landslides and to take steps to mitigate them.