Final answer:
Reserve RED HORSE units report to the Air Force Reserve Command (AFRC) and are tasked with heavy repair and construction missions in support of Air Force and Defense Department operations.
Step-by-step explanation:
The RED HORSE units, which stand for Rapid Engineer Deployable Heavy Operational Repair Squadron Engineers, are part of the United States Air Force and are specialized civil engineering units. Within the organizational structure of the Air Force, reserve RED HORSE units report to the Air Force Reserve Command (AFRC). These units are tasked with a variety of missions including heavy repair and construction tasks, often in challenging or combat environments. They are capable of rapid response and independent operations in remote, high-threat environments to support Air Force and Defense Department missions.