I guess the rejection reason is 'technical issues'? Well, the photo is too dark - it is underexposed.
Secondly, there are gazillions of flower photos, so to have a saleable picture it has to have the 'wow' factor; yours doesn't I'm afraid!
Take a read of this guide to get you started:
Have a read of this. It's a brief guide on image quality:
You should look through the guides from Adobe help files. You will find important information there!
Hey, Thank you so much for your fast answer and links! I trully appreciate that.
Focus (depth of field) noise and underexposed shadows.
Maybee try this:
Ok, I think I get it, thank you!