The correct answer is d) Backwater System.
The Vembanad Lake is a large, shallow lake in the state of Kerala, India. It is the largest lake in Kerala and the second largest lake in India, after the Chilika Lake in Odisha. The lake is an important part of the backwater system of Kerala, which is a network of canals, rivers, and lakes that are connected to the Arabian Sea. The backwater system is a popular tourist destination and is also an important source of water for irrigation and drinking water.
The Chaliyar River System is a river system in the state of Kerala, India. The Chaliyar River is the main river in the system and is a tributary of the Periyar River. The Chaliyar River System is a major source of water for irrigation and drinking water in the state of Kerala.
The Periyar River System is a river system in the state of Kerala, India. The Periyar River is the main river in the system and is a tributary of the Bharathappuzha River. The Periyar River System is a major source of water for irrigation and drinking water in the state of Kerala.
The Bharathappuzha River System is a river system in the state of Kerala, India. The Bharathappuzha River is the main river in the system and is a tributary of the Arabian Sea. The Bharathappuzha River System is a major source of water for irrigation and drinking water in the state of Kerala.