Which method is a sign of clear airway obstruction?

The identification of a choking signal is the correct indication of a clear airway obstruction. A choking signal typically consists of specific behaviors, such as clutching the neck, inability to speak, or distressed facial expressions. This response signifies that the person is experiencing difficulty in breathing due to an obstruction in the airway, which requires immediate attention.

While a finger sweep is a technique that can be used to remove an obstruction if it is visible, it is not a proactive method for identifying an airway obstruction; rather, it is a reactive measure once the obstruction has already been confirmed. Clear vision does not pertain to airway assessment, and nasal breathing indicates that the airway is clear, as it suggests an unobstructed passage. Understanding these aspects is crucial for recognizing signs of airway obstruction and responding appropriately in an emergency situation.