New to uploading. Query on rejection on quality standards

You did not upload your original file as submitted, but I can see errors in the cutout.

The red shows the transition between transparency and opaque elements. In addition to be erratic, your cutout is also shoung "corners". 

Even at a reduced size, your asset is out ouf focus.

Is it the resolution?

By @caren_5446

It's never the resolution. The resolution is not a quality attribute.

The cut out is not good - and it's not perfectly in focus.

This is your competition in the 'Apple' keyword. 

https://stock.adobe.com/search/images?k=apple  5.4 MILLION results

As a customer, which one would you buy? And why?

Also read your Contributor User Guide for more tips:

• 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/contributor/help/how-to-submit-distinct-content.html

The edge cutout could be better, and zoomed in to 100% the soft focus is apparent.

The image is blurry.

It doesn't seem to be in focus.

I am guessing, but I would try to smooth the edges some and sharpen the image.