Which of the following is NOT a sign of severe airway obstruction?

The ability to speak is NOT a sign of severe airway obstruction because a person who is experiencing severe airway obstruction typically cannot speak at all. In cases of severe obstruction, the airway is significantly restricted, making it impossible for air to pass through effectively, which includes the ability to make sounds or form words.

In contrast, signs of severe airway obstruction include difficult or strained breathing, weak or ineffective coughing, and bluish-grey coloring on the skin due to inadequate oxygenation. These symptoms indicate a critical situation requiring immediate intervention. The presence of any of these signs points to a significant compromise in the airway, showing that the person may be unable to ventilate properly or is in distress due to an obstruction.