The Popir dance of the Monpa and Sherdukpen tribes is known for its:

The other options are incorrect because:

• Option (a) is incorrect because the Popir dance is not known for its slow and graceful movements. It is a vigorous dance with fast-paced footwork.
• Option (b) is incorrect because the Popir dance does not use masks. The dancers wear traditional costumes, but they do not wear masks.
• Option (c) is incorrect because the Popir dance does not depict mythical stories. It is a dance that celebrates the culture and heritage of the Monpa and Sherdukpen tribes.