In lines 1,5, 14, and 18, the poet puts a question mark before the end of the line. The poet does this to "exclaim a thought loudly".
The use of question mark by the poet was unique. It made the thoughts of the poet to heard louder. Readers of the poet will be willing to know the answers to the questions in the following lines.
The use of question marks was to exclaim a thought loudly.