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In Porter’s value chain, activities are split into primary activities that create the product or service and support activities that enable those primary activities to run smoothly. Support functions provide the resources, systems, and oversight that allow the entire chain to operate consistently. Firm infrastructure stands out as the umbrella set of activities—general management, planning, finance, legal, quality control, and other cross-cutting systems—that underpin and coordinate every part of the value chain. Because it underpins all the other activities, it’s a clear example of a value chain support function. The other options—human resource management, technology development, and procurement—are also support activities, but they are more specific components within the broader support framework. Hence, firm infrastructure best represents a value chain support function.