The type of figurative language that is "letters" is synecdoche.
Explanation:
Synecdoche is a figure of speech which uses a part to represent the whole and vice versa. In the passage we are analyzing, the word "letters" was a part chosen to represent a whole. Instead of saying that the students were required to wear "the clothing or objects which showcased the Greek letters of their organizations", the author chose to use "letters" as a representative of all that. An example of synecdoche frequently found on the news is when it is said that the White House has issued a report. The White House is being used to represent the people who work in it, or even the President.
Synecdoche is a figurative language where a part is made to represent the whole. "Letters" in the above statement is a good example of synecdoche. this is because it is a part that has been substituted to stand in as a whole. The letters as explained in the statement above means clothing or objects which showcased the greek letters of their organization. So from the meaning you can deduce "letters as a part" but in the statement, it was made to stand as a whole.
<span>the germans became increasingly cruel due to the leadership and the influence of hitler, who was their leader. He was able to bring out the evil in these people. he also was able to threaten and make sure there are consequences if orders are not obeyed.</span>