What does “i was born in the jungle. I have obeys the laws of the jungle. And there is no wolf of ours from whose paw I have not pulled a thorn. Surely they are my brothers” mean?

It means that he has abided by certain mores for his whole life and by using the literal example of “pulling a thorn”, he’s saying, “there’s not one person who i haven’t helped, that’s what makes us brothers. When they need me i help them, and when i need them they help me.” It is interesting because he’s explaining that just because it’s not normal for you doesn’t mean it’s not my version of normal.

I’d go with letter d