These photos are rejected for quality issues. Please help me what are the problems here.

220_F_1498047980_VFuGVGTplvDVZfp4QybFRRYMY5dVqsj8.jpg - extremely blurry, overexposed and lacking contrast

220_F_1498047980_VFuGVGTplvDVZfp4QybFRRYMY5dVqsj8.jpg - poorly composed and there's a large spot in the sky

220_F_1498047946_1yGVtqSJjpje98DvAASRQjo2UidCpVhl.jpg - leaning horizon and poorly composed

These appear to be united cellphone snaps and do not meet Adobe's criteria for professional photography.

Ahmed, I agree with what others have said, cropping is hard to understand, in the first photo horizon line is not straight... and I am also wondering if there's something going on with the lens you used for these photos.

Next time in order to receive good feedback on your photos, you need to include the full resolution images as you submitted to adobe.

Just have fun shooting!

You don't have the right equipment or lighting conditions to properly capture these seagulls. It's challenging even under ideal conditions.  A nice idea, but the execution failed.  

This is what you're competing with in Adobe Stock: 

https://stock.adobe.com/search?k=seagull  15.5 MILLION results

Note the details, vibrant colors and contrasts that go into making a commercial quality image.

Consider taking some photography courses to learn the basics.

Good luck. 

First and third. I can see the issues without have to see the full-sized originals as submitted. Poor cropping (the railing and the fact that there is no space at the end of the boat in the distance, and possibly a slanted horizon line. I'm not even sure what the main subject is in this example, other than the water, I assume, which is uninteresting in and of itself.

You have to upload the original files for us to review.