Step 1: Understand the division of powers in the Indian Constitution.
The Seventh Schedule of the Indian Constitution divides the subjects for legislation between the Union and the States into three lists:
Union List: Subjects on which only the Parliament can make laws (e.g., Defence, Foreign Affairs).
State List: Subjects on which only the State Legislatures can make laws (e.g., Police, Public Health).
Concurrent List: Subjects on which both the Parliament and State Legislatures can make laws (e.g., Education, Forests, Marriage).
Step 2: Identify the source of this feature.
The framers of the Indian Constitution borrowed features from various constitutions around the world. The idea of having a Concurrent List was borrowed from the Constitution of Australia. Another important feature borrowed from Australia is the provision for the joint sitting of the two Houses of Parliament to resolve a deadlock.