Would appreciate Feedback realted to rejections due to 'quality Issues'

[Ivan27224799ip0j]

Hello,
Need some help understanding what was wrong with this set of images. 
It would really help knowing where exactly I went wrong with these images. Apologies if 6 images is too much.

I will try to correct the images according to your suggestions, reupload them and turn back to chat with the results

I really appreciate any help you can provide.

[daniellei4510]

Double check your cutouts against a black background.

[Jill_C]

The cutouts need improvement.