This is an assignment from a teacher who wants you to examine the poem closely and clarify what Frost means by this metaphor. It would be inappropriate for some professor to do the analysis for you, and frankly a waste of your tuition money. Read the poem over several times and then ask yourself how the two choices are different and what Frost may have meant by the last line of the poem. Is one road safe and the other risky? Is one road “seeable” and the other obvious? Etc. Have fun. This is your education.