Final answer:
Appliance World's purchase of metal from Super Steel is a B2B transaction.
Step-by-step explanation:
The transaction between Appliance World and Super Steel is an example of a B2B (Business-to-Business) transaction. This means that both the buyer and the seller are businesses. In this case, Appliance World is the buyer and Super Steel is the seller, and they are engaged in a transaction where Appliance World is purchasing metal from Super Steel to use in their appliance manufacturing.