rule of thirds. 
This photo centers the subject and gives it a lot of pace so it plays the rule of thirds. This photo stroke me because of the way the photographer captures the person walking alone during the time of the storm.

Lines. The subject is in the middle and the photographer used diagonals to focus on the person. I like this photo because it shows a man just sitting there with his hat covering his face, and with his suitcase all alone. The colors, (although they are not vibrant) stand out.