Porque se rechazaron estas fotos?

Look at your pictures at 100% and 200% and see if they are looking naturally and detailed, with not artefacts, no washed out colours and other defects.

The butterfly was out of focus, so you tried to sharpen and compensate for noise:

The result is a pleasant image looked at 30% at most, but at 100% you see washed out colours and structures that disappear. Furthermore, please look at the Butterfly antennas. One is out of focus, the other is simply over sharpened.

As for the girl: look for yourself:

Being dark is not exactly a defect, but it needs to be understandable. Some structure is in most of the cases needed.

(all screenshots are at 100% of the posted images!)

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