Rechazo de las fotos por problemas técnicos

6K0A6571.jpg - both eyes are not in focus; background is distracting; face partially underexposed

6K0A6635.jpg - similar issues but you turned this one sideways

6K0A5222.jpg - cute & colorful, but the verticals are leaning, focus has fallen on her arms rather than her eyes, and her toes are cut off

6K0A6662.jpg - depth of field is too shallow, focus on the eyes is not tack sharp, and the bucket of pencils is distracting. 

6K0A6662.jpg - depth of field too shallow; fingers are blurry and overexposed

The focus issues would seem to indicate that either your shutter speed is too slow for the moving kids, or you've introduced camera shake. 

These are cute snapshots but there's no story in them. I think for this reason, they are not quite ready for commercial use.  Compare your work with other Stock Inventory to see what gets accepted. 

https://stock.adobe.com/mt/search?k=little+girl

Hi, way too many to review each one.

The first photo has overexposed highlights. The horizon is not level and the focus should be a little better.

The second photo in the first row has underexposed shadows in the hair. The horizon is not level and the focus should be a little better.

The third photo in the first row the horizon is not level and the depth of field is too shallow. The photo is poorly cropped.

The fourth photo in the first row the horizon is not level and the photo is poorly cropped.