Answer:
D. movement
Movement is one of the principles of the design and it is used to guide the observer’s view over the art piece.
Before photography, visual arts was one of the only way to capture the world. Famous artists painted portraits of significant people and beautiful landscapes which are very time consuming. I would say photography in its early days is simply a realistic window to see the world and the people in it. The inventors of photography believed that photos are no longer drawn by hand, but "written by light".
An article on petapixel says: The use of cameras has allowed us to capture historical moments and reshape the way we see ourselves and the world around us.
