Explanation:

- Thiruvathira is a traditional festival celebrated in the state of Kerala. It is a significant event for the Malayali community.

- The festival is observed in the Malayalam month of Dhanu (December-January) and involves various cultural rituals and traditional dance forms like Thiruvathirakali.

- Correct Answer: Option 2 - Kerala

- Option 1: Karnataka - Known for festivals like Mysore Dasara and Ugadi, but not Thiruvathira.

- Option 3: Telangana - Celebrates Bonalu, Bathukamma, and other regional festivities.

- Option 4: Tamil Nadu - Celebrates Pongal, Diwali, and other Tamil festivals, but not Thiruvathira.