Final answer:
The figure of speech used in the line "Oh, my love's like a red, red rose" is a simile, which compares two things using "like" or "as," providing a vivid image and connection for the reader.
Step-by-step explanation:
The figure of speech used in the line "Oh, my love's like a red, red rose" is a simile. A simile is a figurative language device that compares two different things using the words "like" or "as." It is often employed in poetry to create vivid imagery and help readers make connections between abstract ideas and tangible experiences. In contrast to a metaphor, which makes a direct comparison without using "like" or "as," a simile explicitly states the comparison by using these specific words.
Examples of similes and metaphors can be found throughout various forms of literature, adding layers of meaning and complexity to the text. When we encounter a simile, we are invited to explore the similarities between the things being compared, and how the author uses these comparisons to enhance our understanding and enjoyment of the poem.