The correct answer is armature. It is the skeleton of something - artists often use armature in order to support something else. So, beneath these soft, pliable materials, such as clay, or wax, you can find an armature made of metal usually, which is there to make sure the whole thing doesn't fall apart.
Answer: This art piece titled "Guernica" uses black, white and grey colors and portrays several abstract themes throughout the painting. This painting is done with oil paint and it was painted by the famous abstract artist Pablo Picasso.
