Answer:
I believe that this expression would be classified as hyperbole.
Explanation:
It is a hyperbole because it's a stretch from the truth, they (being "we") didn't actually walk a hundred miles.
1. To support the topic of the paragraph
2.To wrap up your paper and close it off
3. Show where you got your work so you don't get flagged for plagerism
Answer:
Early American autobiographies include giving stories from individual lives as well as giving life lessons that there readers can get a understatement from.