What should a flight attendant do if there is smoke in the cabin?

When smoke is detected in the cabin, the priority of a flight attendant is to ensure the safety of everyone on board. Activating an alarm is crucial as it alerts other crew members and allows for a coordinated response to the emergency. Communicating via the PA system is necessary to inform passengers about the situation clearly and calmly, helping to manage their responses and reduce panic. Additionally, following established firefighting protocols is essential because it provides a systematic way to address the situation, including locating the source of the smoke, using appropriate fire extinguishing equipment, and ensuring proper passenger and crew safety.

This approach is the most effective in managing the emergency situation compared to other actions, which may either exacerbate the problem or fail to address the danger adequately.