Which option is NOT one of ACE’s five core elements?

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ACE's five core elements describe the essential aspects that enable a force to operate effectively: how it presents itself (posture), how decisions are made and information flows (command and control), how operations are kept going (sustainment), how the force is protected, and how coordination across the force is achieved. Logistics fits under sustainment, handling the planning, provision, and movement of resources necessary to sustain operations. Because sustainment is the designated core element for maintaining operational readiness, logistics isn’t counted as a separate core element. The other options listed match elements that are indeed part of ACE’s core framework. So the option describing logistics is the one that is not a separate core element.