The correct answer is Nilgiris.
The Nilgiris is a district in the Indian state of Tamil Nadu. It is known for its coffee plantations, which are located in the hills of the Western Ghats. The district is also home to a number of tea plantations, as well as a variety of other crops, including cardamom, pepper, and vanilla.
The Nilgiris is a popular tourist destination, and is known for its beautiful scenery, including its mountains, forests, and waterfalls. The district is also home to a number of wildlife sanctuaries, including the Mudumalai National Park and the Bandipur National Park.
The Nilgiris is a well-developed district, with a number of towns and cities, including Ooty, Coonoor, and Kotagiri. The district is also well-connected by road and rail, and is served by a number of airports, including Coimbatore International Airport and Madurai Airport.
The Nilgiris is a beautiful and diverse district, with a rich history and culture. It is a popular tourist destination, and is home to a number of coffee plantations, as well as a variety of other crops. The district is also well-developed, with a number of towns and cities, and is well-connected by road, rail, and air.
The other options are incorrect.
Theni is a district in the Indian state of Tamil Nadu. It is not known for its coffee plantations.
Dindigul is a district in the Indian state of Tamil Nadu. It is not known for its coffee plantations.
Yercaud is a town in the Indian state of Tamil Nadu. It is located in the Nilgiris district, which is known for its coffee plantations. However, Yercaud itself is not known for its coffee plantations.