As highlighted before, the files are not sharp and noisy. They have both chromatic noise and luminance. There is also a halo around the edge of the first file's subject.
The chromatic noise is visible all over, but more obvious on this section of the image.
You need to zoom in on the photos at between 100 and 200% to look for technical issues before submitting. If you do not understand what to look for, here are 23 tabulated and explained criteria you need to meet that will help you submit technically better files.
Unfortunately, you have a problem with focus. Also, did you crop this photo to centre on the subject? it also looks like you have done that. However, you do have a problem with focus. Handholding when zooming can be difficult with fast moving objects. Focus also depends on the camera; sometimes the autofocus isn't fast enough to focus on fast moving subjects. I think this camera fits into that category.
The flower photo shows signs of noise in the background and also suffers from focus problems.
Adobe Stock customers expect the highest visual and technical quality for use in commercial projects. Read the Stock Contributor's User Guide for more tips.
Aquatic animal attractions may be protected property. There could be restrictions on your ability to sell the animal's likeness for commercial use without a signed property release.
When I'm buying images for clients, I look for more white space around the subject. I don't usually buy images that are too closely cropped or clipped. I can crop them myself after purchase if the project requires it.