Composition is a quality issue. In my opinion, the blue background (table?) is pleasing but the vertical element rising from it is ugly and interferes with the main subject. There are other issues, especially with the leaf.
This picture shows the leaf at 100%, which is how Adobe will review it (they may zoom more). You need to do the same, for the entire image.
Click on the picture to open it up. The leaf (because it is the main subject) must be clear, sharp, without colour distortion or other faults.
If you still cannot see what is wrong, you need more training. Consider joining a photo club, but bear in mind that photo club members are not usually trying to make world class commercial shots.