Explanation:

- Moatsu Festival: Celebrated annually by the Ao tribe of Nagaland, it marks the end of the sowing season. It's a time for relaxation and merrymaking with traditional songs, dances, and feasts.

- Option 1: Tamil Nadu

- Festivals like Pongal and Tamil New Year are key cultural events.

- Option 2: Nagaland

- Green tick The Moatsu Festival is indeed celebrated in Nagaland.

- Option 3: Karnataka

- Known for festivals like Ugadi and Mysore Dasara.

- Option 4: Jharkhand

- Celebrated for local festivals such as Karam and Sohrai.