Which literary element is primarily used in Frost's poem to convey deeper meaning?

In Frost's poem, the use of extended metaphor is significant in conveying deeper meaning because it allows for a more complex exploration of themes and emotions. An extended metaphor establishes a comparison between two seemingly unrelated subjects that unfolds throughout the poem, enabling the reader to draw connections and insights that might not be immediately evident. This literary device encourages a more profound understanding of the underlying messages and adds layers to the interpretation of the poem's content. For instance, if Frost uses an extended metaphor related to nature to illustrate the complexities of human experience, it enhances the poem's emotional resonance and invites readers to reflect on their own lives in relation to the theme presented. This depth of meaning is often what makes Frost's work compelling and memorable.