Why do you think certain trees, like pine and oak, grow better in the mountains?
Pine and oak trees grow better in mountains because: (1) They are adapted to cold climates with needle-like or thick leaves that reduce water loss, (2) Their roots can anchor in rocky, steep mountain slopes, (3) They can survive in areas with snow and less direct sunlight, (4) They are adapted to the specific soil conditions found in mountain regions, (5) These trees have evolved over time to withstand strong mountain winds and low temperatures.
Explanation
The chapter mentions that trees like oak, pine, walnut, and chestnut are found in Sikkim's mountains. Mountains are usually cold with many peaks covered in snow. These trees are naturally adapted to grow in cold, rocky environments with steep slopes, unlike plants in deserts (which store water) or coastal regions (which tolerate salt).