Tanjore paintings are known for their use of:

The correct answer is: d) Vibrant colors and gold leaf.

Tanjore paintings are a type of Indian painting that originated in the city of Tanjore in the 17th century. They are characterized by their use of vibrant colors, gold leaf, and intricate designs. Tanjore paintings are often religious in nature, depicting Hindu gods and goddesses. They are also used to decorate homes and temples.

Option a) is incorrect because oil paints on canvas are not typically used in Tanjore paintings. Option b) is incorrect because natural dyes on cloth are not typically used in Tanjore paintings. Option c) is incorrect because watercolors on paper are not typically used in Tanjore paintings.