This photo demonstrates the principle of contrast because of the light and darkness in the photo as well as the contrasting colors of red and green from the color wheel.
Movement
This photo demonstrates the principle of movement because you can see every dancer is doing a section of a dance and you can see their weight is not even on their feet.
Movement
This photo demonstrates the principle of movement because you can see the fur on both of the pups moving as they take steps.
Rhythm
This photo demonstrates the principle of rhythm because of its shape and form. It moves your eyes but the subjects are all similar.
Emphasis
This photo demonstrates the principle of emphasis because of the depth of field and there are other elements in this photo that are out of focus, the shots pouring is more important than anything else.
Unity
This photo demonstrates the principle of unity because all the elements in the photo are helping in the overall message of the photo. The lonely swing.
Pattern
This photo demonstrates the principle of pattern because of the architectural design of the building. For example, the both the windows and the wooden panels are predictable..
Balance
This photo demonstrates the principle of balance because there is equal weight, it is both calm and there is movement and there is depth in the horizon which leads to the sunset.