A commander tracks individual readiness metrics of Airmen because the unit readiness assessment depends on what?

The correct choice focuses on the concept that the unit's overall readiness is intrinsically linked to the individual readiness of its personnel. Each Airman’s ability to perform their duties, maintain their skills, and meet health and training requirements contributes significantly to the unit’s capability as a whole.

When assessing readiness, it is crucial for commanders to focus on individual metrics, as these reflect whether personnel are prepared to accomplish their missions. If Airmen are not deemed "ready," whether due to medical, training, or other personal factors, this can hinder the unit's ability to execute its mission successfully. Thus, understanding the individual readiness of each member allows leadership to identify shortfalls and address them proactively, ensuring the unit can operate effectively when needed.

While leadership support, financial resources, and equipment availability are important factors in overall readiness, they don't directly determine the readiness of the unit without the foundation of individual personnel readiness. Effective leadership, sufficient funding, and equipment are often contingent on having a qualified and capable team to utilize those resources and tools effectively in operational environments.