1. The tone of light and dark created by the shadows
  2. Dynamic shapes of both the glass and the shadow
  3. The lines and patterns in the shadows

Pure glass, because it fits with the theme and the subject of the photo. The Pure glass expresses enlightenment and delicateness with simple objects and lighting without any complex objects

Albert Renger-Patzsch uses simple objects and backgrounds to capture the beauty of the lines, shapes, patterns, and tones. He uses lighting at a certain angle to create shadows that have a gradient tone of light and darkness. The overlapping shapes and lines have a repeating pattern but different lighting to it.