Regionalism in India's is rooted in India's diversity of language cultures tribes and religion. Regional sentiment are accommodated by:

Federalism

The correct answer is Option 3: Federalism

Regionalism in India is rooted in India’s diversity of languages, cultures, tribes, and religions. It is also encouraged by the geographical concentration of these identity markers in particular regions, and fuelled by a sense of regional deprivation. Indian federalism has been a means of accommodating these regional sentiments