Well, generally I don't agree with keeping animals in the circus.
But I guess in some rare cases, provided that the animals are really well treated (which excludes the bigger species, since they can't possibly not be stressed by the small amount of space circus offers), and provided that for whatever reason they can't live in the wild, (their environment is disappearing or they're hurt and would be rejected in a group), I guess it would be acceptable to keep them in a circus.
It would probably work best for the species that more readily socialize with humans: dogs, some monkeys. Again, this would only be acceptable if animal welfare was always in the first place, and if for examples the animals could refuse performing on a given day.
In those circumstances, a circus could provide a predator- free environment for them, which would be beneficial for the animals (but again, I am very skeptical this is ever the case).
Answer:
The novel details two days in the life of 16-year-old Holden Caulfield after he has been expelled from prep school. Confused and disillusioned, Holden searches for truth and rails against the “phoniness” of the adult world. He ends up exhausted and emotionally unstable.
I wrote an essay on this. I said that the human rights issues in this book was lack of education and health care, and unfair pay. Lennie seemed to be lacking academically and there were cases where Lennie was hurt but was not taken care of while Curly was hurt but did get medical help. Also the pay is unfair because there is a very clear difference between the well-being of the workers vs the owners of the ranch.
Hope this helped, good luck! :D