In a three-tiered system, which entities are involved?

• A. Fire
• B. EMS
• C. Private Transport
• D. Fire, EMS, and Private Transport

Answer: (D)

A three-tiered system brings together three distinct yet complementary roles: the fire department handles scene safety, hazard control, and extrication; emergency medical services provides on-scene medical assessment and treatment; and private transport supplies additional or alternative patient movement to hospital when EMS transport isn’t readily available. This combination ensures the incident is secure, the patient receives care, and they are transported to definitive care efficiently. If any one element is missing, either the scene wouldn’t be safely managed, or the patient wouldn’t have timely transport. That’s why involving fire, EMS, and private transport together best fits a three-tiered approach.