A. Negative space is the space around and between the subjects of an image.
B. I found the negative space by just seeing the outer layer of the picture. The negative space is the the picture that seems to be the picture but it's really just the outline of the actually object.
C. I think it helps an artist because if an help you see your drawing in a different point of view or it can help you see a picture in an abstract type of view as well.
D. Yes because again as I said, It can help you see your picture in a different point of view.