Which areas are sparsely populated in India and why?

Sparsely populated areas of India are high mountain regions of Jammu and Kashmir and Arunachal Pradesh and desert parts of Rajasthan. Reasons:
(i) Extremely cold climatic condition, which makes living difficult.
(ii) High and snow covered areas do not favour any kind of habitation.
(iii) There are few regions which are fertile but they too are small and scattered. Besides that, it is difficult to approach these areas since there are no good means of transportation and communication available.
(iv) Desert area of Rajasthan is arid, hot and dry region. It has sandy soils, not suitable for cultivation. So, it does not favour any habitation.