Appropriately, this poem about wind is entitled… let's see… "Wind"—no real mystery there.
The title also helps define the poem as a nature poem, focused on examining one specific object—if you can call the wind an object. The poem goes all-in on the one-word subject of its title, exploring everything the wind's doing in both actual and surreal ways. We get to see the wind from all angles, arriving at a deeper conception of its power and meaning, thanks to the poem's intense focus.