Final answer:
The excerpt that best showcases the use of logos is the factual statement regarding the language demographics of restaurant workers, providing clear logical evidence to support the argument.
Step-by-step explanation:
The excerpt from Fast Food Nation that best illustrates the author’s use of the rhetorical appeal to logos is: “English is now the second language of at least one-sixth of the nation’s restaurant workers, and about one-third of that group speaks no English at all.” This passage uses factual information and statistics to make a logical point about the demographics of restaurant workers, exemplifying an appeal through reason and logic, which is the essence of logos.