Given the following passage  "A diverse range of indigenous cultures exist in Myanmar, the majority culture is primarily Buddhist and Bamar. Bamar culture has been influenced by the cultures of neighbouring countries. This is manifested in its language, cuisine, music, dance and theatre. The arts, particularly literature, have historically been influenced by the local form of Theravada Buddhism. Considered the national epic of Myanmar, the Yama Zatdaw, an adaptation of India's Ramayana, has been influenced greatly by Thai, Mon, and Indian versions of the play. Buddhism is practised along with nat worship, which involves elaborate rituals to propitiate one from a pantheon of 37 nats.",  answer the following question. Note that the answer is present within the text.  Question: How do Bamar perform nat worship?
A:
elaborate rituals