What are the figure speech used in a patch of old snow?

In Robert Frost's poem "A Patch of Old Snow," several figures of speech are employed, including imagery, which evokes vivid sensory experiences of the snow. The poem uses personification, attributing human qualities to the snow, suggesting it has a memory or past. Additionally, symbolism is present, as the old snow represents themes of nostalgia, the passage of time, and the contrast between the freshness of life and the remnants of the past. These devices work together to create a reflective mood.