Needs suggestions about photos
Post original size pictures with the corresponding refusal reason, please.
The third one looks underexposed as for the other ones, it's difficult with these small size pictures.
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
They are unfit for commercial use.
WAYS TO IMPROVE:
Hope that helps.