Final answer:
Feedback is the special form of output from a business process that is returned to the system, supporting the flow of the value chain which is a series of stages in producing a product, often spread across international borders to boost specialization and trade.
Step-by-step explanation:
A special form of output created by a business process that is returned to the system is known as feedback. This concept can be understood in the context of the value chain, an idea that illustrates the way a product is produced in stages, such as the iPhone's design, parts supply, assembly, and marketing, which may take place in various countries. The division of the value chain across different firms and locations facilitates international trade of specialized components instead of only finished products, promoting learning, innovation, and economic gains through focused specialization within the value chain.