Here's why:
* Single Speaker: The poem is entirely spoken by one person, the drowned man.
* Confessional Tone: The speaker reveals his inner thoughts and feelings, expressing his struggle and the tragic misunderstanding of his situation.
* Direct Address: The speaker directly addresses an "unknown" audience, reflecting on his life and death.
* Lack of Dialogue: The poem lacks any conversation or interaction with other characters.
While the poem can also be classified as a free verse poem due to its lack of strict rhyme scheme and regular meter, its primary characteristic is its form as a dramatic monologue.