Robert Frost, a prominent American poet, explores the theme of choices in his poem 'The Road Not Taken,' using the metaphor of a forked path in a wood to illustrate life's decisions. The speaker reflects on the road less traveled, suggesting that such choices shape our lives uniquely, even if they come with regret over the paths not taken. Through various literary devices, including metaphor, imagery, and simile, Frost emphasizes the importance of decisions and their lasting impact.