This photo was rejected for technical issues. Help please, I am new at this. :)

Your image needs some corrections in the cropping, correcting impurrities, exposure and needs to be sharpened. 

Look at your histogram. There are little midtones and slightly overexposed.

Correct the exposure, contrast, highlights and shadows to move toward the middle and get some midtones.

Remove the holes and footprints in the sand, crop in tighter, add some texture and sharpen the image for this result.