Hi @OTONASIKAJE , the two issues that pop out to me are:
It's important to review your photos at 100%-200% magnification to see any issues / imperfections.
I'm not sure how many of the spots were on your background material or some may be dust on your lens or sensor.
I hope this helps. Best of luck with your future submissions.
I'll fix it
The picture is underexposed.
You can use the histogram to check this. You see here that there are many blacks (because of the background), but you see also that there is only little information in the middle part (exposure) and no data with the whites. The lighting is uneven, so even that highlights can be nice, the rest of the subject needs to be correctly exposed, and the highlights should not be dominant.
And effectively, a dark background needs a lot of attention. I normally clean the background extensively before taking the picture. And then afterwards I still need to clean up digitally dust that manifested during the shoot.
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
I didn't care about the histogram Thanks to you, I learned a lot
You're welcome. The histogram is a powerful tool for seeing exposure problems. But most people ignore it because they do not understand what it measures and shows.