Question

Who created the piece of art above entitled, Study of a Woman’s Back? a. Pierre-Auguste Renoir c. Marcel Duchamp b. Henri Matisse d. Georges Seurat

Answer 1

There are many pieces of art named this, some good, some not, but I'm assuming the one you're talking about is the one done by Henri Matisse.

Answer 2

The Study of a Woman's Back was created by B. Henri Matisse. He was the painter who drew a lot of sketches and paintings of women's backs because he was fascinated by them.
It cannot be any of the other painters because their styles differed so much: Renoir painted realistic paintings, Duchamp was more of a sculptor, and Seurat used the technique of pointillism, all of the characteristics which are not visible in this painting.