I don't think it's admiration.
The first two stanzas are about restriction; the last seems to be about hope.
https://www.poetryfoundation.org/poems-and-poets/poems/detail/46459
You could google "Sympathy" theme to get some other ideas.
Which word best describes the theme of "Sympathy" by Paul Laurence Dunbar?
hope
restriction
admiration
activity
I choose C only because it seems more sense but I'm still a little confused...
3 answers
Well, Dunbar certainly feels sympathy for the bird. Does that mean admiration?
http://www.poemofquotes.com/paullaurencedunbar/sympathy.php
http://www.poemofquotes.com/paullaurencedunbar/sympathy.php
Okay..my other guess is hope