Logistics is part of what?

• A. Maintenance
• B. Readiness
• C. Supply chain management
• D. One of the four elements of sustainment

Answer: (D)

Logistics fits inside sustainment. In many defense and operations frameworks, sustainment is the overarching capability that keeps forces operating over time, and it is built from four essential elements: maintenance, supply, transportation, and services. Logistics encompasses the activities that support all four of these elements, so it is considered one of the four elements of sustainment. The other options describe related concepts but don’t map to the four-element sustainment structure: maintenance is just one element, readiness is a condition or outcome, and supply chain management is a broader civilian term rather than the military four-element framework.