The correct answer is: a) Rice cultivation.
Rice is the staple food of Tamil Nadu and is grown in most parts of the state. It is a major source of livelihood for the people of Tamil Nadu. The state has a long history of rice cultivation and is one of the leading rice producers in India.
Millet cultivation is also practiced in Tamil Nadu, but it is not as widespread as rice cultivation. Millets are a type of cereal grain that is grown in dry areas. They are a good source of carbohydrates and protein.
Plantation crops are not grown in Tamil Nadu. Plantation crops are crops that are grown on large plantations, such as tea, coffee, and rubber. Tamil Nadu does not have the climate or the land suitable for growing plantation crops.
Horticulture is the practice of growing fruits, vegetables, and flowers. It is a small-scale agricultural activity that is practiced in many parts of Tamil Nadu. Horticulture is a source of income for many people in Tamil Nadu.
In conclusion, the correct answer is: a) Rice cultivation. Rice is the staple food of Tamil Nadu and is grown in most parts of the state. It is a major source of livelihood for the people of Tamil Nadu. The state has a long history of rice cultivation and is one of the leading rice producers in India.