What should you do if you notice an unauthorized individual walking down the jetway?

When encountering an unauthorized individual in a secure area such as the jetway, asking to see their badge is an appropriate response because it directly addresses the issue at hand. By requesting identification, you can ascertain whether the individual has legitimate access to that restricted area. This proactive approach helps ensure the safety and security protocols are being followed.

Taking this step demonstrates awareness of security procedures and can prevent potential threats from escalating. It shows initiative to assess the situation directly and verify the individual's authorization to be in such a critical area, which is essential in maintaining the safety of both the aircraft and passengers.

Other actions, while potentially valid in certain contexts, do not directly address the immediate need to verify the individual's identity. Ignoring the person could lead to safety risks, informing security or the flight crew may come after assessing the situation by checking credentials first, but asking for a badge is usually the most immediate action to understand the intent of the unknown individual.