The correct answer is: D) All of the above.
Landslides are a type of mass movement that occurs when a mass of rock, soil, or debris moves down a slope. They can be caused by a variety of factors, including heavy rainfall, deforestation, and soil erosion.
Heavy rainfall can cause landslides by increasing the weight of the soil and making it more likely to slide. Deforestation can also lead to landslides by removing trees that help to hold the soil in place. Soil erosion can weaken the soil and make it more likely to slide.
In Karnataka, landslides are a common problem, especially during the monsoon season. In 2018, a landslide in the state killed at least 16 people.
To prevent landslides, it is important to take steps to reduce the risk of these events. This includes planting trees, controlling erosion, and avoiding building in areas that are prone to landslides.
Here is a brief explanation of each option:
- Heavy rainfall: Heavy rainfall can cause landslides by increasing the weight of the soil and making it more likely to slide. When the soil becomes saturated with water, it becomes heavier and more difficult to hold in place. This can cause the soil to slide down a slope, resulting in a landslide.
- Deforestation: Deforestation can also lead to landslides by removing trees that help to hold the soil in place. Trees help to stabilize the soil by their roots. When trees are removed, the soil is more likely to erode and slide down a slope.
- Soil erosion: Soil erosion can weaken the soil and make it more likely to slide. Soil erosion occurs when the soil is carried away by wind or water. This can be caused by natural processes, such as rainfall, or by human activities, such as deforestation. When the soil is eroded, it becomes less stable and more likely to slide down a slope.