Final answer:
Eat and Den's loss of revenue on days with lower customer traffic is due to the perishability of their food service, which means unsold food from one day cannot be stored and sold fresh the next day.
Step-by-step explanation:
The characteristic of services that is causing Eat and Den to incur losses is perishability. Perishability in services refers to the fact that services cannot be stored for later use.
For example, if food is prepared and not sold the same day, it cannot be stored and sold fresh the next day, leading to waste and financial losses for the restaurant. This is unlike tangible goods that can be inventoried if not immediately sold.
The other options, such as intangibility, which refers to services not being physical objects, variability, which is about the consistency of service quality, and heterogeneity, which deals with the differences in service performance, do not directly cause loss of revenue due to unsold food becoming unviable for sale the following day.