The correct answer is Britain. Explanation & Key Takeaways: • The feature of 'Bicameralism' in the Indian Constitution is borrowed from the Constitution of Britain. • Bicameralism is the practice of having two houses or chambers in a legislative assembly. In terms of the Indian Constitution, these two houses are the Rajya Sabha (Council of States) and the Lok Sabha (House of the People). • Britain, with its House of Commons and House of Lords, provided the bicameral system model that India adopted to ensure an efficient system of checks and balances in governance. • The British implemented this legislating system during their rule in India, which was then included into the Indian Constitution when it was framed. • The adoption of bicameralism from the British constitution reflects India's drive to bring together the best practices from constitutions around the world while also staying rooted to its unique values and traditions. Related Concepts: Other borrowed features: • Japan - Concept of "procedure established by Law" • Germany - Suspension of Fundamental Rights during the emergency • USSR - Fundamental duties, The ideal of justice (social, economic and political) in the Preamble, Five-Year Plans • Australia - Concurrent List, Freedom of trade, Joint sitting of the two Houses of Parliament • Canada - Federation with a strong Centre, Advisory jurisdiction of the Supreme Court • South Africa - Procedure for amendment of the Constitution, Election of members of Rajya Sabha • Ireland - DPSPs.