Your images are not sharp, are missing contrast, have washed out colours and details, have been converted to black and white.
The eye should have nice sharp details, the fur around shoud not be washed out.
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
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I'm afraid all of your images seem not to be very sharp and they do lack contrast.
This is another example: