Photos rejected for technical issues

Hi, is it possible to upload a larger version? The size here is just too small to give concrete suggestions. Can I suggest posting a link, rather than posting through here, as the forum auto automatically reduces the file size. Because of this, it is really quite hard to give good advice. 

However, in having an overall look, might I suggest you have a look at your white balance. The owl photo in particular is rather yellow. Also, think about the contrast in the second and third photo.

Post-processing should be about contrast, saturation - not too much, reducing noise if present, fixing horizons -if they're wonky, looking for chromatic aberration on edges - ie. colour fringing on the edges of objects - which could be on the branches of the above photos- can't tell because image is too small.

Read through this guideline from Adobe:

https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html