Introduction:
Walayar Dam is a popular tourist attraction located in the state of Kerala, India. It is an important reservoir that serves various purposes including irrigation, hydroelectric power generation, and drinking water supply.

Location:
The correct answer is option 'C', Kerala. Walayar Dam is situated in the Palakkad district of Kerala. It is located near the border of Kerala and Tamil Nadu, making it easily accessible from both states.

Purpose:
The dam was constructed across the Walayar River, a tributary of the Bharathapuzha River, with the primary objective of providing irrigation water to the agricultural lands in the surrounding region. It also plays a significant role in generating hydroelectric power and supplying drinking water to nearby towns and villages.

Hydroelectric Power Generation:
The dam has a capacity of about 8.86 million cubic meters and a height of approximately 12.8 meters. It has three power stations with a combined installed capacity of 16.5 megawatts. These power stations utilize the water stored in the reservoir to generate electricity, which is then supplied to the local grid.

Tourist Attraction:
Apart from its functional purposes, Walayar Dam has also become a popular tourist attraction due to its scenic beauty and serene surroundings. The dam offers breathtaking views of the surrounding hills, lush greenery, and the calm waters of the reservoir. Visitors can enjoy boating and picnic spots near the dam, making it an ideal destination for families and nature enthusiasts.

Importance for Agriculture:
The water stored in the Walayar Dam is primarily used for irrigation purposes. It serves as a lifeline for the farmers in the region, providing them with a consistent water supply for their crops. The dam's reservoir also helps in recharging the groundwater table, ensuring sustainable agriculture practices in the area.

Conclusion:
Walayar Dam, located in the state of Kerala, serves multiple purposes including irrigation, hydroelectric power generation, and drinking water supply. It is a popular tourist attraction due to its scenic beauty and offers various recreational activities for visitors. The dam plays a vital role in supporting agriculture in the region by providing a reliable water source for irrigation.