The red object isn't entirely in focus and there are spots and debris all over the black object.
...and there is noise and the white patches from the flash to not add to the acceptability...
If you are new to stock, you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
Apart from the technical problems (focus, artifacts, etc...), what is it?
Put yourself in the customer's shoes. Ask yourself, "Would I buy this image? What would I use it for?"
If the answer to either question is "I don't know," then chances are it's not a good fit for Adobe Stock.