Rejected Photos Critique

[Brant5DE6]

These three photos were rejected because of technical issues.  I am really new to all of this and trying to learn.  I was wondering if you all could give me some feedback as to what I need to do differently.  

[Marianne-Deiters]

The flowers are out of focus and Mirror lake has a lot of noise.

[markCP]

I'm new to all of this as well.  Here's a link that may help you better determine the reason for rejection.
https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html

[Paul5FF3]

Same question from me. Which technical reasons? I can only guess. I uploaded the version on the right side and it was rejected. Yes, I manipulated the colors because I think this is the taste of most people. Would one of the other versions have a better chance? Or is the camera of a Mavic 2 Zoom drone too bad in general?