He is planning the windmill
Hello!
The central topic of the poem is letter choice C.
So the central topic of the poem is self.
Hope this helps! :)
The commas must be placed both before and after the nonessential element. For example...
My mom, who hates cooking, ordered takeout.
"who hates cooking" is the nonessential element, and you can see that a comma goes before and after it.