Final answer:
The BVM is the best tool for delivering the highest flow of oxygen to an individual with compromised breathing, as it can provide positive pressure ventilation and a high concentration of oxygen.
Step-by-step explanation:
The best method of delivering the highest flow oxygen to a victim who is having difficulty breathing or is not breathing is through the use of a Bag Valve Mask (BVM). This device allows for a high concentration of oxygen to be delivered to the patient when proper seal and technique are used. The BVM consists of a mask, a valve, and a bag that is manually compressed to provide ventilation to the patient. It allows for oxygen, from an oxygen tank, to be added directly to the flow, ensuring the victim receives oxygen at a higher percentage than ambient air. A non-rebreather mask also delivers high concentrations of oxygen and is suitable for patients who are breathing inadequately, but for a patient who is not breathing or with severely compromised breathing, BVM is the preferred method due to its ability to provide positive pressure ventilation.