The correct answer is: a) Natural pigments.
Traditional paints used in Arunachal Pradesh were often derived from natural pigments, such as ochre, charcoal, and indigo. These pigments were found in the local environment and were used to create a variety of colors, including red, black, blue, and green. The paints were used to decorate homes, clothing, and religious objects.
Synthetic dyes are man-made chemicals that are used to color fabrics and other materials. They are not found in nature and were not used in traditional Arunachal Pradesh art.
Imported colors are pigments or dyes that are brought into a country from another country. They were not commonly used in traditional Arunachal Pradesh art, as the local pigments were sufficient for the needs of the artists.
Textile dyes are pigments or dyes that are used to color fabrics. They are not the same as the natural pigments that were used in traditional Arunachal Pradesh art.