Photos rejected, please help?

[SLoganPhotos]

Hi all, some help would be appreciated, I'm trying to learn what Adobe Stock is looking for. I am not new to photography, I have checked the photos in Lightroom for exposure issues and did not find any. Are they just not unique enough - there's already enough sunflowers and tree images going around? Maybe birch shot seems too crowded? All creative choices made were intentional. Thanks for your input.

[Jill_C]

In the sunflower image, I think the foreground is a bit underexposed. The DOF is rather shallow, causing much of the image to be out of focus.

I think the birch image is also a bit underexposed, and the white balance seems too blue.

[daniellei4510]

The foreground is underexposed.

[Ricky336]

Hello,

I would read more about composition, your images could be stronger.

Also, think about the commercial value. How could these images be used commercially?

Composition:
https://www.adobe.com/creativecloud/photography/discover/photo-composition.html