Please post the original image. We can't give any good advice on tiny thumbnails.
Please post the original picture as submitted and give us the rejection reason as communicated by Adobe. The title of the rejection reason is enough.
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
It's not possible to detect whether it's in focus or whether noise is present from this tiny thumbnail, but the messy composition and underexposed shadows are evident.
Completely out of focus:
The focus is on the plant leaves!
And why is this area in shadow?
The histogram shows an underexposed picture:
Now that I enlarged I could see that the focus was on the leaves of the plant, sadly not enough depth of field