In the greenest of our valleys how does poe use a sound in the excerpt

The main sound device is rhyme.  Also, note that the accent in the verb "tenanted" is placed on the last syllable, which makes it rhime with "head". The same is done with the word "musically", in order to make it rhyme with "valley". A syllable is added to the usual pronunciation of the past participle "tuned" by placing a grave accent on it, "tunèd", for the sake of the rhythm in that verse.

the narrator is a first person, participant one, who describes in the simple past tense important and difficult events in his earlier life. he also provides temporal markers as the month (january) and the time (12: 30 pm). finally the account of his experience is very detailed, to the extent that a participant narrator would talk the same way about his experiences. a good example of such detail is the mention of the “bovril ration” which historically was a native american food adopted by european explorers in arctic and antarctic regions due to its high level of calories.

the universe is complete credible source of our oxygen