A mild airway obstruction is indicated by:

A mild airway obstruction occurs when a person is having difficulty breathing, but their airway is not completely blocked. In this situation, the victim is still able to speak or cough effectively. The ability to cough is important because it is a natural mechanism for clearing the airway and indicates that the obstruction is not severe. When a person can speak or cough, it suggests that there is still airflow, albeit restricted.

The other conditions described in the other options indicate more serious airway obstructions. If the victim is unable to cough and is turning blue, it means they are suffering from a severe obstruction with little to no air exchange. An unconscious person who is not breathing is in a critical condition that signifies a complete airway blockage. Shallow breathing can also indicate a significant issue, as it often means that the body is struggling to get enough air, potentially pointing toward severe obstruction or respiratory distress.