What is emphasized in the description of variable expenses?

Variable expenses are costs that can vary depending on certain factors, most notably the number of attendees at an event. This means that as the number of participants increases or decreases, these costs will fluctuate accordingly. Such expenses typically include items like catering, materials, and accommodations, which all depend directly on how many people are involved.

Understanding that variable expenses are tied to attendee numbers helps event planners effectively budget and forecast the overall cost of an event. In contrast, fixed costs remain constant regardless of attendance and would not exhibit this variability. Therefore, the correct understanding of variable expenses highlights their nature of changing with the scale of the event.