Step 1: A "Barge" is a type of "Vessel" (watercraft). The relationship is: specific type to general category.
Step 2: "Shovel" is a type of "Implement" (tool), matching the relationship.
Step 3: Other optionss: "Mouse" and "Pad" (computer peripherals, not type-category); "Rim" and "Edge" (synonyms); "Training" and "Preparation" (synonyms or process); "Book" and "Anthology" (anthology is a collection of books, not a type of book).