3. The Horizon is not straight, you may want to straighten that unless it's intentional.
4. Petals at the top of the flower seema bit unatural, maybe a bit over processed? Also the wood panel bottom left is a bit distracting.
1. I like the way the you've captured the wave breaking but everything seems a bit far away for me, maybe go back and try and get something with some more foreground interest as well, or crop a bt off the bottom and top?
2. I like this, there is a bit too much space at the top of the image, maybe a slight crop there? Also There is maybe a bit of detail lacking in the posts, though i guess there may have been nothing you could do about that.
Comments meant constructively - what's the brief for the competition?
Good luck!
Al