Which of the following would be considered a component of EEFI?

The correct answer is position, as it directly relates to the potential vulnerabilities in military operations and strategies. EEFI, or Essential Elements of Friendly Information, refers to critical information that, if obtained by an adversary, could compromise the effectiveness of friendly operations. Position refers to the geographical placement of personnel, equipment, and resources, which is vital information that enemies may seek to exploit for tactical advantage. Protecting information regarding location is crucial in military contexts to maintain operational security and avoid compromising missions.

Logistical movements, personnel training, and supply chain management are important in their own rights but are not classified as components of EEFI in the same direct manner that position is. While logistical movements may affect operational security, they are broader in scope and do not pinpoint immediate vulnerabilities as directly as position does. Similarly, while personnel training and supply chain management are essential for operational effectiveness, they don't represent immediate points of actionable intelligence that could influence adversarial planning compared to information on positions.