Here, you can really feel the air that girl is feeling too. With her hair all over the place, you can assume that the wind source is coming from below her and makes her hair move. Her hair is also very nice!
This photo represents value. In this photo you can see the highlights where the sun is shining on her and the shadows where it doesn't. The darker areas show more depth than the highlighted ones. (photo by Sarah Loven ) Idea of using shadows