Rejected for Technical Issue

While I agree with @steveb1789221 that in the long run you will have better success with upgrading your camera and lenses, I think specifically in the case of your butterfly photo, you must have upsized it signifcantly and that created a whole bunch of new problems.  It's really important to review your photos at 100%-200% magnification (as this is what the reviewers will be doing too.) 

When you look at this image at 100%, it is clearly not focused and there is a lot of noise and artifacts introduced into the image.  There is also chromatic aberration (purple fringing) along the flower.  I'm not sure if you shoot in RAW with manual settings, but I would suggest that would be a good place to start to take control rather than letting the camera choose automatic settings for you.

Regarding the cardinal photo, besides the soft focus there is also the issue of the out of focus twigs in front of the bird.  The twigs are distracting.  Adobe Stock considers composition issues like the twigs as Technical Issues too.  Both photos are cropped just a bit too close - the cardinal's tail is cut off and the tip of the wing of the butterfly is cut off.  Also with the butterfly photo, the shadows could be lifted a bit and the highlight of the one flower is blown out.

Some things to keep in mind when submitting stock photos:

• Use the highest resolution you can with your camera, but don't upsize the images.
• Shoot in RAW format to allow for easiest post processing.
• Keep post processing to a minimum, and keep your colours, tone, exposure, etc. looking very natural

Here are links to some resources you might find useful:

• Submission requirements:  https://helpx.adobe.com/stock/contributor/help/photography-illustrations.html
• Reasons for rejection:  https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• Quick Start guide for contributing:  https://helpx.adobe.com/stock/contributor/user-guide.html

Best of luck with your future submissions.

Sam,

Both of your images are "soft" meaning they are not in sharp focus which most likely is due to the limitations of your camera (sensor size and or lens resolution).  Keep in mind that your images are competing with those being taken with very expensive cameras but more importantly, stock photography sets a very high standard for acceptance.  While your camera should be able to create acceptable images under ideal circumstances and lighting, I would expect you will continue to see a number of rejections in the future (using this camera).   While this is only my opinion, I would suggest you consider buying a interchangeable lens camera (minimum 4/3 format), if you are serious about photography and want to make money while pursuing your hobby.  You might even consider buying a used camera and lens  (spending  the majority of your money on the lens).  Good luck!