Concept:Madhubani paintings use natural colours, often made from locally available materials like powdered rice.Explanation:Madhubani art, also called Mithila painting, comes from Bihar. Artists traditionally prepare colours from plants and natural sources. The most common material is a coloured paste of powdered rice. Other natural ingredients like turmeric, indigo, and flowers are also used. These paints are eco-friendly and inexpensive. Therefore, for making Madhubani paintings, artists use a coloured paste of powdered rice.Answer:Option D: coloured paste of powdered rice.