In the first half of the poem "the raven," the poet creates suspense by having the reader question

why the speaker feels so sad.
how lenore came to die.
what is making the rapping sound.
whether the speaker will love again.

The correct answer is letter c, what is making the rapping sound. It is because having to make sounds that are loud or sounds or something nerve-wrecking makes the readers feels suspense once the poet suggest or creates it in his or her poem in which we can see in the first half of the poem, ‘the raven’.

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