Answer:
The correct answer is - The poem uses free-verse structure.
Explanation:
If you take a look at the poem, you will see the following:
- it does not follow a rhyme scheme: nothing rhymes in the poem
- it is not a sonnet: there are no 14 lines
- it does not follow a fixed pattern of meter: some lines are longer, some are shorter
What is true is that this is a free-verse poem, which means that it doesn't follow any strict rules. Just take a look at the structure:
From the tower window
the moon
draws a silver maple’s shadow
across a spangled lawn;
horses
rear, manes lashing the air,
front legs floating.