Rejected photo

The reason for rejection was in the letter you received.  What rejection reasons were given? 

Read your Contributor User Guide for more details.

• https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
• https://helpx.adobe.com/stock/contributor/user-guide.html/stock/contributor/help/photography-illustrations.ug.html
• https://helpx.adobe.com/stock/how-to/tips-stock-image-acceptance.html
• Model/Property Releases:
  https://helpx.adobe.com/stock/contributor/help/model-release.html
  https://helpx.adobe.com/stock/contributor/help/property-release.html

Your last: the soldier is underexposed and needs a model release. I did not check the sharpness.

What is Monorial Day?

The face appears to be malformed and the edges are jagged. You should also consider not always using the square format from your aI generator.

Generally speaking, assets with text will get rejected. Buyers want to add their own text.

That t-shirt with the rose: Adobe doesn't sell t-shirts. The rose alone might be accepted, then people can use it for other purposes.

Memorial Day: Submit holiday assets at least 3 to four months in advance.