SeattleBW:
- B/W - Adobe would like original colour pictures. The customer can convert to B/W if he or she needs B/W, BUT it also features noise and other defects that make it unsuitable for stock:
- 9831: Nice picture, but you need to get rid of the artefacts and make it look natural:
Look at your pictures at 100% and 200%. If you detect artefacts, correct or if they cannot be corrected, do not submit. This looks a lot like colour noise and excessive contrast.
- 18518623684_dafcdda59d_o:
Great picture but over sharpened and B/W... Get the original colour picture and rework to get rid of any artefacts, do not sharpen too much, get the colour balance right and resubmit.
- 35439326695_bc877b8e6a_o:
Not sharp, colour noise and probably one or the other logo visible.
- _dsc4624-editjpg_39030539652_o: not sharp, B/W and a lot of noise and artefacts.
- idem for _DSC2074-Edit.
- _dsc4001jpg_24788650447_o: chromatic aberration, no contrast, out of focus

- _DSC0737: Wrong white balance (too cool), noise, sharpening artefacts:
As @Nancy OShea told you, do not post many pictures in one post. You see, most of my critiques are the same. Also as a beginner, you should start submitting one or two pictures and looking for the reaction. B/W pictures nearly never pass because all colour images can be converted to b/w, but b/w cannot recover colour.
And you should really read the manual beforehand... (I agree, I didn't at my beginning)! But I did discover the links at a later stage only. If 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