Challenge: 8 A very nice attempt and good use of the light colors. Original idea of using cotton.
Technical: 6 I think maybe a light projected at it would have enhanced the cotton fibers and the texture in the white background would have disappeared from the light.
Composition": 10 I call it centered right which gives a good effect on something with curves. Good choice of angle.
Appeal: 7 I liked the ripples in the background I liked the bowl enhancing curves I just needed less texture in the material used for the background.
Overall: 8