The phrase "the island of Manhattan" does not contain figurative language; it is a literal description of the actual geographic location. However, if you're considering how "island" might evoke feelings of isolation or beauty, it could be seen as metaphorical in certain contexts.
For the options given, the most appropriate choice, if we're strictly examining figurative language and interpretations, would be Metaphor, since it can represent more than just the physical aspect, depending on the context (like urban culture, lifestyle, etc.).
However, if strictly interpreting the phrase as it is, it does not inherently illustrate a figurative language form as it simply denotes a physical place.