The classical Manipuri dance form with graceful movements and emphasis on devotional themes is:

Thang Ta
Lai Haraoba
Ras Lila
Dhol Cholom

The correct answer is: c) Ras Lila.

Ras Lila is a classical Manipuri dance form with graceful movements and emphasis on devotional themes. It is a dance-drama that tells the story of Krishna and Radha, two lovers from Hindu mythology. The dance is performed by a group of dancers, who wear traditional Manipuri costumes and makeup. The dancers move in intricate patterns, accompanied by music and singing. Ras Lila is a beautiful and moving dance that celebrates the love between Krishna and Radha.

Thang Ta is a Manipuri martial art that is also performed as a dance. It is a fast-paced and acrobatic dance that involves the use of swords, spears, and shields. Thang Ta is a powerful and exciting dance that celebrates the martial prowess of the Manipuri people.

Lai Haraoba is a Manipuri folk dance that is performed to celebrate the arrival of spring. It is a joyous and colorful dance that involves the participation of all members of the community. Lai Haraoba is a celebration of life and the beauty of nature.

Dhol Cholom is a Manipuri folk dance that is performed to celebrate the harvest. It is a lively and energetic dance that involves the use of drums and other percussion instruments. Dhol Cholom is a celebration of the abundance of the earth and the hard work of the people.