Why did India choose/Adapt holding together federalism

Federalism in India refers to relations between the Centre and the States of the Union of India. The Constitution of India establishes the structure of the Indian government. Part XI of the Indian constitution specifies the distribution of legislative, administrative and executive powers between the union government and the States of India. The legislative powers are categorised under a Union List, a State List and a Concurrent List, representing, respectively, the powers conferred upon the Union government, those conferred upon the State governments and powers shared among them.

Explanation:

answer; the federal reserve system;