Read the poem below and answer the question that follows.
"The Road Not Taken"
by Robert Frost
Two roads diverged in a yellow wood,
And sorry I could not travel both
And be one traveler, long I stood
And looked down one as far as I could
To where it bent in the undergrowth;
Then took the other, as just as fair,
And having perhaps the better claim,
Because it was grassy and wanted wear;
Though as for that the passing there
Had worn them really about the same,
And both that morning equally lay
In leaves no step had trodden black.
Oh, I kept the first for another day!
Yet knowing how way leads on to way,
I doubted if I should ever come back.
I shall be telling this with a sigh
Somewhere ages and ages hence:
Two roads diverged in a wood, and Iā
I took the one less traveled by,
And that has made all the difference.
Source: Frost, Robert. "The Road Not Taken." Poets.org. Academy of American Poets, n.d. Web. 4 Apr. 2011.
How would a formal interpretation differ from a biographical interpretation of this poem? Explain how you would interpret this poem from either theoretical point of view.