Please tell me the cause of rejection. Explain me please why.
It was taken with shallow depth of field. The head and paw seem focused, however the back is not sharp.Also there is a halo around the lower section of the subject that does not appear to be natural shadow. It gives the impression of the image being cropped from another background and placed on the white background. If that is the case, it is better if you submit photos as you take them. The only post processing allowed, is that for corrections, such as exposure, and noise reduction.
Your image is a bit cool looking - a bit too much blue, so you need to increase your colour temperature a bit - add a bit more yellow.
Ok, now I relaize problem of my image. It seems that I need to practice more , and always remember of depth of field. So my issue is clear. Next steps are 1. catch my charming kitten. 2. try to make better image woth correct depth of field. Thank you fo your explanations and comments).