The photograph on the bottom is most expressive because it shows the movement of the dancer. The one on the top just looks like she is standing still. The photo on the right is more interesting because something is actually happening. Dance is all about movement, so photos depicting it should also show movement in order to accurately represent it.
Triptych = a picture presented in three parts or sections that are side by side
Diptych = same as triptych, but with two parts instead of three
Abstraction = the emphasis of ideas instead of clear subject matter
Abstraction in photography = making real life unidentifiable using photography techniques (e.g. zooming in on an object so close that you can’t tell what it is)
This image uses depth of field to bring the viewer’s eye to the center of the spiral by having that part in sharp focus and the edges out of focus. This use of depth of field emphasizes the spiraling lines, which therefore enhances the abstractness of the photo because there is no clear subject matter, only lines.
The contrast of the black and white lines creates deep focus, which does not effectively enhance the abstractness of the photo because the deep focus makes the photo more realistic. Real life has deep focus.