The correct answer is: a) Rainfall during the monsoon seasons.
Tamil Nadu is a state in India that is located in the southern part of the country. The state has a population of over 72 million people and is the sixth most populous state in India. Tamil Nadu is a major economic hub in India and is home to a number of industries, including textiles, automobiles, and electronics.
The state of Tamil Nadu receives most of its rainfall during the monsoon seasons, which are from June to September. The monsoon rains are essential for the state’s agriculture and economy. The state also has a number of groundwater resources, but these are not as reliable as the monsoon rains.
Desalination plants are not a major source of water in Tamil Nadu. The state has only a few desalination plants and these are not able to meet the state’s water needs. Inter-state water agreements are also not a major source of water for Tamil Nadu. The state has a number of inter-state water agreements with other states, but these agreements have not been able to meet the state’s water needs.
In conclusion, the correct answer to the question is: a) Rainfall during the monsoon seasons.