Answer:
The speaker is recalling, "with a sigh," how difficult it had been for him to choose the more traveled or the less traveled of the two roads. The forked road is a metaphor for the inherent duality in the natural world.
Step-by-step explanation:
The speaker of the poem is showing how difficult it was to choose one of the paths of life, as it was completely unpredictable where the path would lead, or what would have on the path, so he sighs while deciding. He ends up choosing the least popular path, but he does it by intuition, not because he knows what will happen.
This poem is a metaphor for the duality of the natural world, where we must make important and impactful choices all the time.