What is regionalism? What factors is it usually based on?

Regionalism is the natural liking of people to the specific area or region they belong to.

Regionalism is based on following factors –

a) India has cultural diversity including diversity of language, religion and tribes. Therefore, regionalism is rooted in India's diversity.

b) Indian federalism has been a way of accommodating these regional sentiments.

c) During British period India was divided into large provinces called Presidencies and the three major Presidencies were Madras, Bombay and Calcutta. It continued even after independence and these were reorganized into ethno-linguistic States within Indian Union after the adoption of constitution.