SIGNIFICANCE OF HIMALAYAS

1) Strategic significance. A natural frontier of India with other countries(China, Pakistan, Afghanistan,etc) 

2) Climatic significance. Prevent further northward movement of summer monsoon and also prevent cold northern winds from Siberia to enter into India.

 3) Agricultural significance. Formation of Himalayas created a trough to its south which is later filled by the sediments from the Himalayan rivers which is today known as northern plains-Indo-gangetic plains- Rich agricultural grounds. 

4) Economic significance- Himalayan rivers have huge hydro-electric power potential. Moreover, Himalyan timber and medicinal plants have economic significance. 

5) Tourist spot- large ecological diversity and hill stations 

SIGNIFICANCE OF INDIAN OCEAN FOR INDIA- 

1) Strategic significance- India overlooks some of the most important sea lanes viz suez canal, Malacca strait. 

2) Economic significance- Long coastline, 2.02 million sq km EEZ ( exclusive economic zone)- Hydrocarbons, fishery potential, wave energy, tidal energy, OTEC.

 3) Marine biodiversity and rich ecosystem with coral reefs, mangroves- Tourist attraction.

 4) SW monsoon generates in Indian ocean.