Por que rechasaron mi imagen

From a compositional standpoint, the waterline is slanted and this would work better in landscape mode rather than portrait.

This contains nothing of visual interest to draw viewers into your scene. A boat, a coastline, a pier, something for viewers to grab onto. 

You’re competing with millions & millions of similar photos on Stock and other websites. 

What do these have that’s missing from yours?

https://stock.adobe.com/search?k=sunsets  32 million results

https://stock.adobe.com/search?k=sunset+ocean 7 million results

Read through your Contributor User Guide 

See Popular Subjects: 

https://helpx.adobe.com/stock/contributor/submit-your-content/submit-photos/photo-submission-overview.html

Hope that helps.

Probably because there and many images like it. Lots of competition so maybe its too hum drum? Adobe is probably looking for something they don’t have yet in their collection. Something unique and something absolutely perfect.