What is one of the largest systems in an arena?

The largest system in an arena is often the concessions system. This is due to the extensive infrastructure required to operate food and beverage services, which typically encompasses purchasing, storage, preparation, and sales operations. Concessions involve various vendors and products catering to the diverse preferences of attendees, with many stands and kiosks set up throughout the venue.

This system must effectively manage logistics, including inventory control, staffing, and customer service, to ensure a seamless experience. Not only does it address the need for food and drink during events, but it also significantly contributes to the overall revenue generated by the arena. Properly managing this system is critical for event success and customer satisfaction, as the availability and quality of concessions can enhance the fan experience.

Other options, while important, do not match the scale and impact of the concessions system within an arena. Ticketing, lighting, and security are essential components of arena operations, but they typically do not involve the same level of complexity or breadth in terms of logistical coordination and staffing that the concessions system does.