The correct answer is (a) Along the coast.
Traditional fishing communities in Tamil Nadu are primarily found along the coast. This is because the state has a long coastline of over 1,000 kilometers, and the sea has been a major source of food and livelihood for the people of Tamil Nadu for centuries. The state’s fishing communities are known for their unique culture and traditions, and they play an important role in the state’s economy.
Option (b) is incorrect because hilly regions are not suitable for fishing. Option (c) is incorrect because urban areas are not typically home to traditional fishing communities. Option (d) is incorrect because major rivers are not the primary source of food and livelihood for traditional fishing communities in Tamil Nadu.