If you view photo 9401 at 200% or more you will see artifacts around the hand and fingers. Also, the squirrel needs more sharpness.
If you view photo 9378 at 200% or more you will see color fringing around the hand and jacket. Also, the squirrel needs more sharpness.
For photo 1 and 5642 I think focus is the issue. Photo 5642 is also too tightly cropped on the hand.
I agree with @Ralph Lear regarding sharpness and colour fringing (chromatic aberration). I would also add that in both of your squirrel photos, they need to be rotated so that the trees are vertical and not leaning. There is also a lot of grain in noise in the photos that can easily be seen at 100%
Regarding the photo with the eggs, the couple of issues I see is the colour banding (posterisation) in the shadows at the bottom of the eggs and the yellow egg is missing some colour at the top. It would have been nice if you also cloned out the scratch in several of the eggs.
Hopefully you can fix the sharpness, remove the noise and level out the photos and resubmit them. The egg photo should be easy enough to correct and resubmit.
Here are some links that you might find helpful:
Best of luck in your future submissions.
thanks a lot for the detailed answer