Good focus and a properly exposed image (i.e. not over or under exposed).
The woman is facing the light source, which is what you typically want in a portrait of a woman.
It seems like you're trying to show that the human form can be interpreted as a piece of art. Here you're juxtaposing the ballet dancer in front of the fountain to show that the form of the dancer can be a replacement for the fountain itself. But on the other hand, you could have just placed the dancer in front of the fountain simply because you thought that the fountain was cool and you thought it would be a nice background. Not sure which is correct here.
The problem that I have is that the depth of field is far to great. By created such a large DOF, you're allowing the viewer to wander into the background and it therefore takes strength away from the main subject.
The placement of the woman directly in front of, and so closely to, the fountain produces a form that meshes the form of the fountain with the form of the woman, the sum of which is a element or shape that is confusing and non distinct. Stop and don't think of the woman and fountain as a woman and a fountain, but instead see them form and shape. The combination that you've created is a rather jumbled mess.
The lighting is too harsh and really not that good even though it's mid afternoon or mid morning. At least you didn't take this shot in the middle of the day. On the plus side, the side lighting does a really good job of showing off the texture and form of the dress. I think a partly cloudy day or maybe waiting until sunset could, maybe, have produced a better lighting situation. Using light on an overcast day would have hidden all of that texture, and probably wouldn't have worked.
Overall it's a good attempt, but it needs a lot of work. Maybe place not one, but multiple ballet dancers in the water around the fountain to produce a form where the dancers are part of the fountain as opposed to simply placing one dancer over a fountain because it's a cool thing to look at.