Answer:
The sardonic tone in the passage helps the writer to achieve the purpose of mocking the political speech.
Explanation:
The given excerpt is taken from the book titled 'In Pharoah's Army: Memories of Lost War' written by Tobias Wolff. The book is an autobiographical account of the writer of his days of duty in Vietnam War and it's effect on his life.
In chapter 12 'Civilian' of the book, Wolff mocks the political speech being transmitted over microphone. In the given excerpt, the author has created a sardonic tone. This sardonic tone is used by the author to achieve the purpose of mocking the political speech. The short sentence at the end of the passaeg creates the mocking of speech and forms the sardonic tone that the author not just laughed at the political speech but laughed out loud.