Warli paintings are traditionally painted on earthen walls with:

Rice flour

The correct answer is Option 3- Rice flour

The Warli paintings are traditionally painted with rice flour on earth-coloured walls of their homes. They are painted to promote fertility, these paintings avert diseases, propitiate the dead, and fulfill the demands of spirits. A bamboo stick, chewed at the end, is used as the paintbrush.

The Warli community inhabit the west coast of Northern Maharashtra around the north Sahyadri range with a large concentration in the district of Thane. Married women play a central role in creating their most important painting called Chowk to mark special occasions.