What is positive space?  It is the main focus of the design. It generally will be the 1st thing your eyes track to.  What is negative space?  It is everything else in the picture or design. The relationship of where the positive space and the negative space is within the design, will play a major part on perception of the design.  Would an object closer to the viewer normally appear lower or higher in an image?  Closer,because are eyes believe it to be that way.  Would objects in the distance usually appear lighter or darker when compared to objects that are closer to the viewer?  Lighter,as distance things get faded more and more.  Would objects that are closer to the viewer appear to have sharper focus than those in the background?  Yes they would,again as distance progresses,sharpness fades.