Present participle would be 'clipping'. Perfect participle would be 'having clipped'. Therefore, the only option left is 'past participle'.
That no man born of a woman can do him harm
The sentence "We are also told that it is on account of this happening that people who have loved each other very much sometimes quarrel and are no longer friends." best indicates the story's message or theme.
I think its 16maybe from what I can understand from your language