The correct option is (b).
Explanation
Mountains are significant landforms that play a crucial role in the hydrological cycle, agriculture, and biodiversity. They are often referred to as the "water towers" of the world due to their capacity to store water in the form of glaciers and snow.
- Statement 1 is Incorrect: Mountains are not generally dry areas; rather, they are storehouses of water. Many major rivers originate from glaciers located in mountain ranges. Reservoirs are frequently constructed in these regions to harness water for irrigation and hydroelectric power generation.
- Statement 2 is Correct: The river valleys and terraces found in mountain regions are highly suitable for agriculture. The availability of water and fertile soil in these specific areas makes them ideal for the cultivation of crops. Terrace farming is a common adaptation in these terrains to prevent soil erosion and maximize arable land.
- Statement 3 is Incorrect: Mountains are not devoid of vegetation; they host a rich variety of flora and fauna. The forests found in mountain regions provide essential resources such as fuel, fodder, shelter, and other forest produce like gum and resins.
Key Takeaway: Mountains are vital natural resources that serve as the source of perennial rivers, support specialized agriculture through terrace farming, and sustain diverse forest ecosystems.