Kummi is a folk dance traditionally performed by:

The correct answer is: d) Mixed groups.

Kummi is a folk dance traditionally performed by mixed groups of men and women. It is a circular dance that is performed in a fast tempo. The dancers move their hands and arms in a rhythmic pattern, and they often sing as they dance. Kummi is a popular dance in India, and it is often performed at weddings and other celebrations.

Option a) is incorrect because Kummi is not traditionally performed by men only. Option b) is incorrect because Kummi is not traditionally performed by women only. Option c) is incorrect because Kummi is not traditionally performed by children only.