D. As you should quote the author and their page number in most cases.
He supported advances in art, architecture, science, math, and education.
In photography, composition is the way of how elements are arranged to create the best shot. A good composition contributes to a nice photography. One example is street photography. In the streets, you can't control objects based on how you want them to be positioned. Instead, you anticipate for the objects to move in the exact spot on where you wanted them to be.
The second one is the sfumato technique
Color grading is the process used to change the visual tone of an image, many photographer's use this. Hope it helps!