In the raven - how does the poem’s use of internal rhyme contribute to the tone of the piece? cite at least one example in your 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.    

One example of this can be seen in the lines 57-58:

Nothing further then he uttered - not a feather then he fluttered -

Till I scarcely more than muttered "Other friends have flown before -

On this example, there are two rhymed words in line 57, and a third one on line 58. Even though the third word is on a different line, it's considered to be internal rhyme because it's not in the end of the line. The three words are not only connected by rhyme, but because they all have to do with sound (or lack of sound, in the case of fluttered).  

With the use of alliteration  , rhyme and internal rhyme poet can also control the mood of the Poem .

The repetition comes across as very spooky, and the rhyme gives the poem a sing-song quality that is also very haunting.  The words are carefully chosen to make the reader uneasy.

The Raven" that seems almost Baroque in its recurring motifs.Ravens have coexisted with humans for thousands of years and in some areas have been so numerous that people have regarded them as pests.

Part of their success as a species is due to their omnivorous diet: they are extremely versatile and opportunistic in finding sources of nutrition, feeding on carrion, insects, cereal grains, berries, fruit, small animals, nesting birds, and food waste.

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the rigid outer part of the earth, consisting of the crust and upper mantle is the lithosphere.     answer   crust and outer part of the mantle.