Answer:Internal rhymes are patterns of rhyming words inside the same line. This effect can increase the tension of the poem, as it can make the reader to accelerate the pace, or to slow it down by making more emphasis on the rhyming words.
Increasing tension is a very important part in The Raven's tone, as the speaker becomes more anxious as time passes by, because of the feathered animal's presence.
Explanation: “Once upon a midnight dreary, while I pondered, weak and weary,
While I nodded, nearly napping, suddenly there came a tapping,
As of someone gently rapping, rapping at my chamber door.
Tis some visitor,” I muttered, “tapping at my chamber door…
Ah, distinctly I remember it was in the bleak December;
And each separate dying ember wrought its ghost upon the floor.
Eagerly I wished the morrow; – vainly I had sought to borrow
From my books surcease of sorrow – sorrow for the lost Lenore…”
