why not pass

Adobe tells you the reason. Post that with one of your refused images in the quality as submitted, and we will look at the image.

You've definitely got some similar or identical images - the yellow chicks, the hens, the roosters.... look at the rejection reason on each image. If you want specific feedback, upload a few of the images here in full size and indicate the rejection reason for each.

We don't know. You need to upload a couple of the rejected images at the full size as submitted. We can't tell anything from these thumbnails.