A unique folk dance of the Lepchas, often performed during the harvest festival, is:

Chu Faat
Tamang Selo
Yak Chaam
Maruni

The correct answer is: a) Chu Faat.

Chu Faat is a unique folk dance of the Lepchas, often performed during the harvest festival. It is a dance of thanksgiving and celebration, and is performed to honor the gods and ancestors. The dance is characterized by its intricate footwork and its use of traditional Lepcha instruments.

The other options are incorrect because:

  • Tamang Selo is a folk dance of the Tamang people of Nepal. It is a dance of courtship, and is performed by a man and a woman.
  • Yak Chaam is a folk dance of the Tibetan people. It is a dance of exorcism, and is performed to ward off evil spirits.
  • Maruni is a folk dance of the Garhwal people of India. It is a dance of joy and celebration, and is performed during festivals and weddings.