Read the incomplete quatrain.No one knows the dreams within my mindThey vanish with the early light of dawnAnd leave no trace for meddlers to find

The missing line should fit the poem’s idea that the speaker’s thoughts are private and hidden. “My mind’s a window with the curtains drawn” continues that image of concealment, and its ending rhymes with “dawn” in the next line. The other choices do not rhyme with “dawn” or fit the line’s rhythm as well.

AI-written and checked against the verified answer.