Why are landslides common in mountains during the rainy season?
Landslides are common in mountains during rainy season because: (1) Mountains have steep slopes where soil and rocks can easily slide down, (2) Heavy rainfall makes the soil loose and unstable, (3) Water seeps into cracks in rocks, making them weak, (4) Deforestation on slopes removes trees that hold the soil together, (5) The continuous flow of water lubricates the surface, reducing friction and causing soil and rocks to slide down, (6) Gravity pulls loose material down steep mountain slopes.
Explanation
The chapter mentions that mountains are rocky landforms that rise high above the ground with steep slopes and are surrounded by valleys. During rainy season, the combination of steep slopes and water infiltration makes landslides more likely. This is a natural hazard that mountain regions face.