The meaning of the poem shows a word "independence" which is opposite to our feelings... she used the symbol "hero" to describe what there is in people's inside(heart).
It's a nonessential word, clause, or sentence added to an already grammatically complete sentence. It's most commonly set off by brackets, but it can also be set off by commas or dashes.
Example:
My mother went to the supermarket and picked up some strawberries (my favorite fruit) earlier today.
I would say A because it is saying how something feels
