The Kaveri River forms a fertile delta in:

The correct answer is: d) Eastern Tamil Nadu.

The Kaveri River is the longest river in the Indian state of Tamil Nadu. It originates in the Western Ghats in Karnataka and flows through the states of Karnataka, Kerala, and Tamil Nadu. The Kaveri River forms a fertile delta in the eastern part of Tamil Nadu. The delta is a major agricultural region and is home to a number of important cities, including Chennai, Madurai, and Trichy.

The Kaveri River is a vital source of water for irrigation and drinking water for millions of people in the region. The river is also a popular tourist destination, with a number of temples and historical sites located along its banks.

Here is a brief explanation of each option:

• a) Central Tamil Nadu: The Kaveri River does not flow through central Tamil Nadu.
• b) Southern Tamil Nadu: The Kaveri River does not flow through southern Tamil Nadu.
• c) Western Tamil Nadu: The Kaveri River does flow through western Tamil Nadu, but it does not form a delta in this region.
• d) Eastern Tamil Nadu: The Kaveri River does form a delta in eastern Tamil Nadu.