Answer:
I know this is VERY late, but the other person is incorrect! I am posting the CORRECT answer for other users to realize the correct answer and get it right. :) Anywho, the answer is "has two stanzas" because they are asking about the STRUCTURE of the poem, not what the two poems are talking about. Thanks so much! Hope future people get this right! :)
It is a participle,
A participle is a word that is formed from a verb and used as an adjective.
In this case, the verb is "to break" but in this case is used to describe the staircase as broken
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