good afternoon. I am newbie. please tell me what are the mistakes in the photo? they were not accept

Frog: noise and artefacts in both images:

Cat:

Artefacts and noise:

Plant: besides artefacts and noise, the main subject is out of focus:

Chicken: Artefacts.

Glasses:

Chromatic aberration, probably also noise.

I didn't look very deep into your pictures, generally it should be enough to post one and to get in depth answers on that.

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