Final answer:
The correct statement about bird respiration is that air flows continuously through bird lungs.
Step-by-step explanation:
The correct statement about bird respiration is B. Air flows continuously through bird lungs.
Birds have a unique respiratory system that enables them to meet the high oxygen demands for flight. Unlike mammals, bird lungs have a flow-through system where air flows unidirectionally through the lungs. This allows for efficient gas exchange and ensures a constant supply of oxygen.