problemas de calidad de imagen

Other services have lower acceptance standards than Adobe Stock. 

It's a good subject.  I'l grant you that.  But the image quality isn't quite ready for commercial use. 

It needs more contrasts, color correction and sharper details.  See Histogram panel in Photoshop.

Read these links from your Stock Contributor User Guide:

• https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
• https://helpx.adobe.com/stock/contributor/user-guide.html/stock/contributor/help/photography-illustrations.ug.html
• https://helpx.adobe.com/stock/how-to/tips-stock-image-acceptance.html

Hope that helps.  Good luck with your next submission.  🙂