Dúvidas sobre qualidade das fotos

What was the refusal reason? 

Your last image will probably get a refusal because of ip, even if you can solve the visible artefacts.

The second image has visible artefacts and the first one is as a flower picture in a highly competitive section. You will need an exceptional good picture to be accepted there.

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