How does the author make fun with the words America and USA? Devoted son

The question is taken from the chapter 'Devoted son'.

Q. How does the author make fun with the words America and USA?

Ans: The author makes fun of the words "America" and "USA" by using humor and irony. In a story, a father insists on using "USA" instead of "America" to avoid sounding ignorant. The author pokes fun at how people take language too seriously and try too hard to be politically correct. The father's insistence is absurd and adds to the humor.