Final answer:
The primary exchange in the event triangle model is entertainment, where the event provides an enjoyable experience to the fans, who in turn offer their time, attention, and possibly money to participate.
Step-by-step explanation:
The primary exchange made between the event and the fan in the event triangle model is c. entertainment.
In the event triangle model, the core focus is on the dynamic relationship between the event, the fans, and the sponsors. The event provides entertainment to the fans, which is what they primarily seek when they decide to attend or follow an event. This entertainment can take various forms, such as sports competitions, concerts, festivals, or any other type of public performance or gathering. For the fan, the value received is in the form of an enjoyable experience, emotional engagement, social interaction, and sometimes even a sense of belonging to a community. In exchange, fans may offer their time, attention, and sometimes money in the form of tickets or merchandise purchases. Importantly, this exchange is at the center of the event triangle relationship, as it directly impacts the commercial opportunities for sponsors and ultimately influences the overall success of the event.