1. Negative space is all of the space around the subject of an image. AN example is if you have a picture of a plane flying through the sky, then the subject would be the plane and the negative space would be all of the sky around it.
2. I found negative space in my cut out by tracing each color to use as the subject of either side, and in my drawings by combining different sketches and erasing the boundaries in order to create one solid looking blank spot.
3. It is useful for an artist to be able to see negative space because it allows them to make drawings with a clearer message, and so that they don't end up painting just a blob of prime colors.
4. Negative space is useful in art because it clearly contrasts between the subject and the background.