Final answer:
A potentially serious airway injury from a burn can occur in situations where there is constriction and tightening of the airway. The situation that would indicate a potentially serious airway injury is a firefighter who is wheezing after working in an overhaul after a fire.
Step-by-step explanation:
A potentially serious airway injury from a burn can occur in situations where there is constriction and tightening of the airway, a swollen throat, or a sensation of a lump in the throat that makes it difficult to breathe. In the given options, the situation that would indicate a potentially serious airway injury is a firefighter who is wheezing after working in an overhaul after a fire. Wheezing suggests a constricted airway and could be a sign of a more severe injury.