1. The blur in the background appears to have been done after the fact, and looks unnatural. You could have eliminated the need to do that by straightening and cropping out more of the background.
2. Blown out highlight in the background
3. Same as above and an image of the back of the head probably isn't saleable.
4. Lens spot in the sky and visible logo on the shoes
Thank you so much for your comments.
For 1: you should not use the iPhone portrait mode. The fake blur is rarely correct. The cat's fur is not as sharp as you would think at the first sight.
But the picture is one of the better cat images. Very nice, but unfortunately not usable for stock.
For 2: Artefacts in the background, the cat gives the impression of being pasted into the picture. I suppose it's also due to the portrait program.
For 3: The cat is not in focus, respectively the fur has been “optimized” by the phone. Painterly look of the water:
For 4: This is really unfortunate. The background is missing contrasts and shows this paiterly look:
The logo on the shoes needs to be edited out.
Thank you for your comments. I will use it in the future.
All four photos are with white balance issue. They are all too blue.
The first photo composition could have been better with a little more depth of field. The entire suitcase should be in focus.
The third photo also needed more depth of field.to get subject completely sharp.
The subject of the next photo is out of focus and is with chromatic noise.
Thank you, I will use this in the future.