Superb series of pictures, but this one is my favorite.
She has a beautiful expression on her face (but then she does in all of them), and as a stock photo, this pose can be applied in many ways.
Her hair is not frizzy, so it can be cut out to do layers without looking overly fake, and I like the way she's holding the leaf. The fact that she's not looking at the camera gives the photo a natural feel.
Although I haven't tried it yet, I think the lack of contrast betwen her sleeves and the shadow of the tree in the background may make it difficult to cut her out of the picture, if so desired.
Other than that one point, it is a picture of beauty and serenity, and I'm faving it for potential use. Thumbs up and thanks for putting it on here for our use!