Picture Rejected

As a guess, I would say rejected for technical issues. There is a magenta cast in the photo. The rock is the wrong colour for example. You have to change the white balance/colour temperature. This is apart from the other issues that @Abambo pointed out!!

Read this about adjusting white balance:
https://www.adobe.com/creativecloud/photography/discover/white-balance.html

As for zooming in, yes, you do get to see more pixels, but it should still be 'clean' if one zooms to 100%.

In the upper part of the animal's head, there is a very sharp contour line without a smooth transition of the shadow. A green leaf with sharp irregular contours is the second confirmation of rough processing. Here has been applied (Fill) - (Selections with fill based on content). Usually, after that you need to remove color noise and graininess.

You always need to give us the refusal reason.

Here you have, however, a high level of noise. In addition, the picture is not really sharp (shake?).

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