The correct answer is A. Kinnaur.
The Beesh festival is a major festival celebrated by the people of Kinnaur district in Himachal Pradesh. It is a harvest festival that marks the end of the agricultural season. The festival is celebrated for three days and is marked by a number of rituals and ceremonies. The main event of the festival is a procession that is taken out from the temple of the local deity, Beesh. The procession is accompanied by music and dance and is followed by a feast.
The Beesh festival is a time for the people of Kinnaur to come together and celebrate their culture and heritage. It is also a time for them to give thanks to the gods for a bountiful harvest.
Option B, Una, is incorrect because the Beesh festival is not celebrated in Una. Una is a district in Himachal Pradesh, but it is not in Kinnaur.
Option C, Sirmaur, is incorrect because the Beesh festival is not celebrated in Sirmaur. Sirmaur is a district in Himachal Pradesh, but it is not in Kinnaur.
Option D, Solan, is incorrect because the Beesh festival is not celebrated in Solan. Solan is a district in Himachal Pradesh, but it is not in Kinnaur.