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Multiple Choice

Which of the following is a natural cause of landslides?

Groundwater pressure is indeed a natural cause of landslides because it refers to the force exerted by water in the soil. When there is an increase in groundwater due to heavy rainfall or snowmelt, it can saturate the soil, reducing its cohesion and weight, which can lead to slope failure. As the pressure from the water increases, it can push soil particles apart, making it easier for the material to slide down a slope. In contrast, the other choices represent human-induced factors or activities rather than natural processes. Deforestation can exacerbate landslides by removing trees that stabilize the soil, but it is driven by human activity. Blasting and earthworks involve deliberate actions to alter the landscape, such as construction or mining, which can destabilize slopes but are not natural causes. Thus, groundwater pressure stands out as a key natural contributor to the likelihood of landslides.

Groundwater pressure is indeed a natural cause of landslides because it refers to the force exerted by water in the soil. When there is an increase in groundwater due to heavy rainfall or snowmelt, it can saturate the soil, reducing its cohesion and weight, which can lead to slope failure. As the pressure from the water increases, it can push soil particles apart, making it easier for the material to slide down a slope.

In contrast, the other choices represent human-induced factors or activities rather than natural processes. Deforestation can exacerbate landslides by removing trees that stabilize the soil, but it is driven by human activity. Blasting and earthworks involve deliberate actions to alter the landscape, such as construction or mining, which can destabilize slopes but are not natural causes. Thus, groundwater pressure stands out as a key natural contributor to the likelihood of landslides.