This photo shows SPACE because the only subject in the photo is a person standing on an edge. The photographer purposely made the person small and placed him or her in the corner to represent loneliness.
In this image, the blur of people moving around in the crowd makes it look interesting, but it is also focusing on particular people who are standing, walking, moving in what looks like a busy area. A slow shutter speed is used in this image.
Properties of light and how to apply them in photography. Another silhouette favorite, I like the way the light outlines her head. For some reason, this says a lot about the emotion of this subject, and silhouette is very effective way to portray emotion.