1. Chandelier image - not much in focus here, leaning verticals, and the white balance is too yellow
2. Train car - this image is much too small to evaluate and very pixelated, but I can tell that it's quite underexposed, has artifacts, and the white balance is too yellow.
3. Lilacs - only 1 branch in focus, leaning verticals, underexposed shadows, blownout sky
4. Park bench - poorly composed (should have been in landscape orientation), underexposed shadows; same with the next 4 portrait orientation images some of which also have leaning verticals.
I'll stop there. Keep in mind that posting 2-3 images here is usually what is expected by the community, since those will usually reveal the type of quality issues for which the entire batch was rejected.
Adobe Stock is not interested in unedited vacation snapshots; they need carefully composed, high-quality, carefully edited images for commercial applications including ads, brochures, billboards, webpages, etc. I'm assuming many of these were taken with a mobile phone camera, which doesn't handle low light situations very well, though they can produce acceptable images under good lighting conditions. However, those images still need to be edited before submission.