This shot fell on my 30,000th vote so I am going to stop and spend a little extra time commenting on it.
I like the contrast between the flower and the background and the flower you selected is nice. The crop on the flower to me does not seem to fall at a natural break making it seem like it just barely makes it into the picture, this is just my take and everyone crops to thier own liking. The lighting also seems pretty harsh and the flower and back ground have several areas that are a little to blown out. good luck in the challenge!