Final answer:
While there is no single garnish that accompanies all seafood, lemon wedges are commonly used because lemon juice reacts with amines in fish to reduce odor and add flavor. Hence the correct option is 1.
Step-by-step explanation:
The question what garnish accompanies all seafood does not have a single correct answer, as it can vary based on personal preference, cultural influences, and the type of seafood dish being served. However, a common garnish that is often associated with seafood dishes is lemon wedges.
The reason for this is that many people enjoy adding lemon juice to fish. Lemon juice, being an acid, reacts with volatile amines present in fish to form involatile ammonium salts. This reaction reduces the fishy odor and adds a sour taste that enhances the flavor of the seafood.