Brackets. in quotes, square brackets show that the writer changed the original source. you might use them to change an ambiguous pronoun (such as "he" or "they") to a specific person or group (such as "abraham lincoln" or "school teachers"). they're also used to modify the phrasing of the original source to fit your sentence, such as changing a verb from from present tense to past tense.
Annihilate and decimate both mean to destroy something or someone, but annihilate means to destroy something as a whole, and at a bigger scale, while decimate doesn't have to mean destroying the whole thing.
Eradicate and massacre are both violent words with the intent to convey destruction, but eradicate is a more general term, as massacre is meant to simple destroy/kill a large group of people.
Nando is wondering would they leave me its 3rd person the author tells the characters feelings
I cant tell the conflict but the chill was starting 2 rise.........?
E.Hyperbole
The water was not literally freezing. A hyperbole is a figure of speech that exaggerates something, in this case the use of a hyperbole exaggerates how cold the water is.
