Mention India's population distribution in terms of densities with reasons.

India's population distribution:

(i)The average population density of India in the year 2001 was 324 persons per sq km and varies from, 904 persons per sq km in West Bengal to only 13 persons per sq km in Arunachal Pradesh.

Rugged terrain and unfavourable climatic conditions are primarily responsible for sparse population in these areas.
(ii)Assam and most of the Peninsular states have moderate population densities.
Hilly, dissected and rocky nature of the terrain, moderate to low rainfall, shallow and less fertile soils have influenced population densities in these areas.
(iii)The Northern Plains and Kerala in the south have high to very high population densities because of the flat plains with fertile soils and abundant rainfall.