What is the main signal that a person may be choking?

The primary indicator that a person may be choking is when they are holding their throat. This gesture, often referred to as the "universal sign for choking," indicates distress and an inability to breathe properly due to an obstruction in the airway. When individuals grasp their throat, it signals to bystanders that they are in trouble and may require immediate assistance.

While the other options highlight various responses a person may display, they do not signify choking effectively. Speaking clearly suggests that the airway is not obstructed, and the person can breathe normally. Coughing vigorously can indicate that the airway is partially obstructed, allowing some air exchange, rather than a complete blockage. Normal breathing also indicates that choking is not occurring, as a choking individual would typically exhibit labored or wheezing breaths. Thus, holding the throat is the most reliable signal that someone may be choking and requires urgent help or intervention.