Question

Q. Debris avalanche and landslides occur very frequently in the Himalayas, which among the following can be the reason,

Select the correct answer using the code given below :

• A.
  1 only
• B.
  2 and 3 only
• C.
  1 and 3 only
• D.
  1, 2 and 3

Answer 1

The correct option is B

2 and 3 only
Explanation:

Statement 1 is incorrect: The Himalayas are not tectonically stable. That is why earthquakes are frequent in the Himalayas. The collision of Indian plate with Eurasian plate makes the Himalayas unstable.

Statement 2 and 3 are correct: Debris avalanche and landslides occur very frequently in the Himalayas. There are many reasons for this. One, the Himalayas are tectonically active. They are mostly made up of sedimentary rocks and unconsolidated and semi-consolidated deposits and the slopes are very steep. Anthropogenic reasons like deforestation, mining etc also aids landslides.