The correct answer is: a) Earth tones (red, brown, yellow).
Traditional Assamese painting often uses a limited color palette dominated by earth tones, such as red, brown, and yellow. These colors are often used to represent the natural world, such as the earth, the sky, and the forest. They can also be used to represent emotions, such as love, sadness, and anger.
Option b) is incorrect because bright and vibrant colors are not typically used in traditional Assamese painting. Option c) is incorrect because pastel shades are also not typically used in traditional Assamese painting. Option d) is incorrect because black and white are not typically used in traditional Assamese painting.