The Dree Festival is a major agricultural festival celebrated by the:

The Dree Festival is a time for thanksgiving and for praying for a good harvest in the coming year. It is also a time for feasting and merrymaking. The main events of the festival include the sacrifice of a mithun (a type of wild cow), the performance of traditional dances and songs, and the exchange of gifts.

The Dree Festival is a time for the Apatani people to come together and celebrate their culture and heritage. It is a time for them to renew their ties with their community and to pray for a good future.

The other options are incorrect because:

• The Nyishi tribe celebrates the Mopin Festival.
• The Galo tribe celebrates the Hareng Festival.
• The Adi tribe celebrates the Solung Festival.