Final answer:
The pet grooming service struggles due to a poor location that is not easily accessible, leading to reduced revenues and potential failure.
Step-by-step explanation:
The student's question seems to be about evaluating factors that may lead to the failure of a business, specifically a pet grooming service operated by Valerie. By analyzing the provided text, we can determine that the business struggles due to the high cost of rent, which forced Valerie to choose a location that is not easily accessible by public transportation. This pointedly suggests that the factor leading to failure is likely poor location. When businesses choose locations that do not attract enough foot traffic or are inconvenient for customers to reach, they often see a significant decrease in revenues. In contrast to issues arising from expanding too fast, poor marketing, or unreliable partnerships, the challenge described here directly relates to the daily operation and accessibility of the service.