Question

how can tell that himalayas play vital role in india's development ?

Answer 1

Himalayas act as a climatic barrier and prevents the cold north east monsoon from Russia.If Himalayas were absent India would have been that very cold.
Himalayas obstructs the monsoon wind and makes rain to fall on the sub continent.If not India would have been a hot dry desert.

It acts as a tourist spot attracting many tourists all around the world.

Himalayas act as a major source of perennial rivers like Ganga,Bhramaputra,godhavari,etc

Himalayas acts as a huge source of minerals and hydro electric power plants.

Answer 2

1) The seasonal cycles of accumulation of ice, movement and melting of glaciers are the sources of the perennial rivers.

2) The Himalayas influence India's climate in different ways.

3) They protect the great plains of India from the cold winds of central Asia during severe winter.

4) They cause for summer rains and monsoon type of climate.

5) The perennial rivers bring a lot of silt, making the plains very fertile.

6) The fertile plains are useful for cultivation.

7) The valleys are useful for orchards and growing vegetables.

8) The hill stations attract the tourists so as to increase tourism.

9) The rivers are useful in producing hydel power.

10) Hence it is said that the Himalayas play a vital role in India's development.