1 one subject with no competing subjects
2 subject stands out because of size
3 subject placed on rule of thirds
4 subject is a different colour
5 background is blurred
6 several of above rules apply
7 subject placed to avoid touching other elements in frame
8 subject framed by something else
9 leading lines
excellent photos in accordance with the rules. aces!
this is apt for this month's theme-seasons; maybe tag it, please?