In addition to @Jill_C's remarks:
to 1)

This should show some structure, it only shows washed out colours. This is typical for small sensor cameras and as long as you can't avoid such artefacts, your pictures will get refused. There is no corrective measure possible for this.
2)

3)
If the picture was OK, you would need to submit a model release for this gentleman:

4)
Artwork may need a property release:



last:
I wouldn't exactly say that this is "well focused". It's oversharpened, oversaturated and shows a bunch of noise, and I'm convinced, I didn't name all the faults. In addition, it shows an iconic building with many recognizable marks on.

I doubt that if you would buy any of these pictures for your holiday catalogue or your travel agency billboard that you would be happy.
As @Ricky336 said, you can detect most of the defects yourself and writing lengthy critics takes too much time. Even with that little information that the moderator needs to give, you have contributors wondering why moderation takes such an awful amount of time.
Even if @Jill_C tried to look at the assets positively (correcting the faults, resubmitting), please do yourself a favour and sort pictures like these out before submitting. Your refusal/acceptance ratio will be much better. Faults like this are not correctable. The time you invest in keywording would be better spend.
With all this said, congratulation to your 20 pictures that passed. As for the refusals: keep them for your pleasure and a reminder of a great holiday.
As you are new to stock, you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html