When an artist decides to utilize a variety of material to create an artwork the artwork is considered?

In "thirty are better than one" 1963 by andy warhol describe to what degree this image depicts rhythm or pattern

Select one work of art from the gallery that culturally represents the period it was created within. (i choose "the well of moses")why did you select this work of art or architecture? when selecting and writing about your work organize your thoughts by addressing the following questions. keep in mind that the last question should get the most attention in your short essay. when was it made? where was it made? what is the material? who made it? why was it made?

Which principle of design is in primary use in this structure?