The Monpa tribe is known for their beautiful:

Sand paintings
Thangka paintings (Tibetan Buddhist art)
Stone sculptures
Beadwork

The correct answer is: b) Thangka paintings (Tibetan Buddhist art).

Thangka paintings are a form of Tibetan Buddhist art that are traditionally used as religious objects. They are typically painted on cotton or silk cloth and depict scenes from Buddhist mythology or history. Thangka paintings are often very colorful and intricate, and they can be quite large. They are usually kept in temples or monasteries, but they can also be found in private homes.

The Monpa tribe is a Tibetan ethnic group that lives in the eastern Himalayas. They are known for their beautiful thangka paintings, which are often used in religious ceremonies. Thangka paintings are typically made by monks or nuns, and they can take many months or even years to complete. The paintings are made using a variety of materials, including pigments, dyes, and gold leaf. They are often decorated with jewels and other precious objects.

Thangka paintings are an important part of Monpa culture. They are used to teach religious concepts, to celebrate important events, and to ward off evil spirits. Thangka paintings are also a source of income for many Monpa people. They are often sold to tourists or to other Tibetans.

The other options are incorrect because:

  • Sand paintings are not typically associated with the Monpa tribe. They are more commonly associated with the Navajo and Pueblo peoples of the American Southwest.
  • Stone sculptures are not typically associated with the Monpa tribe. They are more commonly associated with the Han Chinese and other ethnic groups in East Asia.
  • Beadwork is not typically associated with the Monpa tribe. It is more commonly associated with Native American tribes of the Great Plains and the Southwest.