The word ‘during’ is a preposition.
A preposition is a word that shows the relationship between a noun (or pronoun) and other words in a sentence. In the case of ‘during,’ it indicates a time period within which something happens. For example, in the sentence ‘I read a book during the movie,’ ‘during’ connects the reading of the book to the time frame of the movie.
Essentially, ‘during’ helps specify when an action takes place, making it a crucial part of understanding the sequence of events in writing.