Nongkrem Dance, a significant Khasi religious festival, is performed to:

The correct answer is: a) Honor the harvest goddess.

The Nongkrem Dance is a significant Khasi religious festival that is performed to honor the harvest goddess, Nongkrem. The festival is held every year in the month of November to celebrate the harvest and to pray for a good harvest in the coming year. The dance is performed by a group of men and women who wear traditional Khasi costumes and masks. The dance is accompanied by music and singing.

The other options are incorrect because:

• Option b) is incorrect because the Nongkrem Dance is not performed to appease the tribal deity.
• Option c) is incorrect because the Nongkrem Dance is not performed to mark the change of seasons.
• Option d) is incorrect because the Nongkrem Dance is not performed to commemorate a historic victory.