Looking for feedback on why this pic was rejected.


It's dramatic but the colors are over-saturated. It doesn't look natural, too stylized.
In Stock photography, white balance should be neutral. Customers will colorize images for their particular project based on what the project designer specifies, not what the photographer decides.
https://www.adobe.com/creativecloud/photography/discover/white-balance.html
Read the Stock Contributor User Guide carefully, especially the DO's & DON'Ts.
Better luck next time.
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