What is an example of additional crew members performing as operation cabin crew?

Serving food and beverages is an excellent example of additional crew members performing as operation cabin crew. In the context of an airline, operational cabin crew are primarily responsible for the safety and comfort of passengers during the flight. When additional crew members assist in serving meals and beverages, they contribute to the overall efficiency of in-flight operations, helping to ensure that service standards are upheld. This role is crucial in maintaining a pleasant in-flight experience and freeing up primary cabin crew to focus on safety and emergency procedures.

Other options, while related to cabin operations, do not directly reflect the involvement of additional crew members in operational duties. For instance, selling duty-free items generally falls under the responsibilities of cabin crew, with a focus on sales rather than on core operational duties. Leading safety briefings is primarily the responsibility of the flight crew, as they are trained specifically for safety protocols. Managing passenger boarding is typically handled by ground staff or authorized personnel rather than being classified as a cabin crew operation. Serving food and beverages distinctly illustrates additional support in a direct operational capacity, making it the best choice.