Thanks everyone for all of the critiquing. I know stock photo sites don't prefer landscape but I don't like portrait photography and just want to do it fun fun at this point. I was wondering if the photos I posted on flickr would be 100% but I guess I was wrong. Like I said on the digital side of photography, technology just confuses me, so can someone tell me how I can upload a 100% version onto flickr. 

Wow I now feel even more horrible after reading posts where people don�t fail the QC often and on my first outing starting out all 4 of my photos fail (also the fact that Alamy says "70% of first submissions pass"). That�s a huge blow to my self-confidence as a budding photographer and I was hoping that anyone could help and tell me why my photos failed. I guess I just don�t know what to look for when checking my images. I did look a the QC failed reasons on their website, but that didn�t help.

So the first image (DSC05035) got a interpolation artifacts and compression artefacts reason. The second and third image (DSC06342 & DSC04525) got a compression artefacts reason. The last image (DSC05062) got a interpolation artifacts reason. I want to learn from my mistakes and create great photos, so I hope everyone can help me out.

https://www.flickr.com/photos/137754526@N08/albums/72157668285591172

These are some of my questions about the said photos.

 I�m not very good at understanding technology but I was under the impression that compression meant that your file has been shrunk down for size. All of my files go straight from the camera into Lightroom, so I don�t understand how my images were "compressed". The second critique, interpolation artifacts, is something I just don�t understand in general. What I mean when I say that is when I looked in the QC failure reasons I don�t understand what it is trying to tell to me, so I don�t know what I did wrong. Is there a better example someone could give for this?