Technical issues

Here regarding photo 3:

I would try this:

I love No 3: the sunflowers look so alive and tell me a story. The large flower is also well focused. Otherwise I agree with Jill_C. It's great that you don't pout, you want to improve your skills. Keep it up! Maybe you can find your own style.

Honestly, I think Adobe is too harsh. All of those photos look amazing. So, as a photographer, I would suggest also selling to other websites such as shutterstock.

1. Underexposed shadows and too shallow depth of field

2. Not in sharp focus and white balance seems to be a bit too yellow

3. Large blurry leaves in foreground are distracting and composition is lacking. Cropping could improve the composition 

4. Butterfly is not in sharp focus