Wonderful lighting and color. What a fitting shot for the challenge! I didn't vote in this challenge but if I did, I couldn't see myself giving anything lower than a 7.
That flowing hair and her expression makes me wonder how this would look in another crop. I know this was entered for the green challenge and the crop you used works well for that purpose but I'm wondering if a much tighter crop would help convey your daughter's expression and personality better. For example, when I pull this in photoshop I cut off a bit from the top so part of her hat is missing and from the bottom I cut off up to where her hair ends. It's a little more square like, but for me anyway, it adds something that compliments the way she is posing. If I had more to work with on the left side I might also think about going with a more landscape look with the crop example I gave.
Anyway just some random thoughts. This is very good and I could only wish to produce professional looking images like this. Good luck in future challenges!