Two things to keep in mind when you're deciding whether to use formal or informal english are
a. the author and the audience.
b. the occasion and the audience.
c. the reader and the location.
d. the opinion and the occasion.

byron utilizes literary techniques to emphisize the illustration of the woman in the poem “she walks in beauty”.

for instance, he uses alliteration to use repetitive consonant sounds when he is writing a word at the beginning of a phrase. he uses personification to give personality to a thing or action. he uses imagery when he is describing the woman. we also can find metaphors to better compare a moment.

these techniques add to the reader’s experience of beauty when the author describes the woman physical beauty and the purity of her mind, using imagery.  

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i'm pretty sure you can use the word uproar