Final answer:
Among the options provided, a Paramedic is a licensed ambulatory health-care worker, highly trained to provide emergency medical treatment in various and often challenging settings.
Step-by-step explanation:
The licensed ambulatory health-care worker from the options provided is a) Paramedic. Paramedics are highly trained experts who provide emergency medical treatment and are capable of performing rescue work and complex medical procedures in various settings. These workers are skilled in stabilizing and treating patients before they reach the hospital, which are often the first critical steps in saving lives. They typically work under the direction of a medical doctor and may be employed by various entities such as fire departments, hospitals, or private companies.
Phlebotomists are also skilled health-care professionals, trained in the art of drawing blood for various purposes such as analysis, transfusions, donations, or research. Their expertise in phlebotomy is recognized through certifications by societies like the American Society of Phlebotomy Technicians after passing a national examination. While they play a crucial role in the medical field, they are not typically categorized as ambulatory health-care workers.