i did the test and variety of shapes is wrong. You're in k12, right? intermediate art? it didnt tell me what the correct answer was, but you can rule out variety of shapes.
Louise Nevelson used form and shapes as the main element of art in the sculpture Dawn's Wedding Chapel IV.
Explanation:
By the principle of unity in visual language, forms need to relate to each other, to have links, nexuses, to contribute to the idea of a cohesive set. Figures can be grouped or repelled, depending on their visual characteristics. Similar forms tend to establish links, attract each other, even if they are far from each other.
