Rejected image

Examine images at 100% magnification. Your foreground is too blurry.  

Also this is what you’re competing with in Stock inventory: 

https://stock.adobe.com/search?k=toes+in+sand  23K results

Slanted horizon line for starters. The feet confused me at first, as this is a photograph that is commonly taken by people on vacations and every one of the dozens I’ve seen includes both feet of the photographer. But I understand what you were going for. Problem is, both feet are out of focus and they are the principal subjects.

What were you trying to express with this photo?
I think you need a composition and focus that align with your theme.
While focusing on the feet is a common approach, the focus here is on the beach in the background.
Also, I think it would be better if more of the feet were visible.
Try to give some thought to the composition before you press the shutter.