The correct answer is (a) The Nilgiris.
The Nilgiris are a mountain range in the Western Ghats of southern India. They are known for their cool climate, tea plantations, and wildlife. The Nilgiris are also home to the Nilgiri tahr, a mountain goat that is found nowhere else in the world.
The Nilgiris are a popular tourist destination. Visitors can enjoy hiking, trekking, and camping in the mountains. They can also visit tea plantations, wildlife sanctuaries, and the town of Ooty, which is known for its colonial architecture.
The other options are incorrect because they are not mountain ranges. The Coromandel Coast is a coastal plain in eastern India. The Kaveri Delta is a river delta in southern India. The Palani Hills are a mountain range in western India.
The Nilgiris are the best place to cultivate plantation crops like tea, coffee, and rubber because they have a cool climate and fertile soil. The mountains also receive plenty of rainfall, which is essential for growing these crops.