NEET BIOLOGY

Detailed explanation-1: -Detailed Solution. The correct answer is 2 and 3 only. It is defined as the movement of a mass of rock, debris, or earth down a slope. Landslides are a type of “mass wasting, ” which denotes any down-slope movement of soil and rock under the direct influence of gravity.

Detailed explanation-2: -What causes them? Climate and climate change. Climate and climate change controls precipitation and snowmelt (frequency, intensity and magnitude, seasonality, cyclonality and the respective changes), and are the most important external drivers for landslides and flooding. Land use changes.

Detailed explanation-3: -Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.

Detailed explanation-4: -Falls. Falls are landslides that involve the collapse of material from a cliff or steep slope. Falls usually involve a mixture of free fall through the air, bouncing or rolling. A fall-type landslide results in the collection of rock or debris near the base of a slope.