a lunch server holds up two different meal options to a long line of hungry students. Nearly all the students eagerly point toward the pizza slice while only one or two students show interest in the salad option. The pizza tray is almost empty from high demand while the salad tray remains completely full. Students behind the counter cheer and gesture excitedly toward the popular pizza choice. Other cafeteria workers notice the clear preference and start preparing more pizza. one food option being preponderant over the other in popularity and demand