Final answer:
Harris mentioning the time constraint of less than twelve hours in Beehive class 9 underscores the urgency of the situation, pushing the characters to act swiftly.
Step-by-step explanation:
In the scene referenced from Beehive class 9, Harris particularly mentioning that they had less than twelve hours' time to start likely serves the purpose of highlighting the time constraint they were under. This detail emphasizes the urgency of their situation and compels the characters to take immediate action. While creating suspense is a plausible effect, the situation described seems more focused on the pressing need to act quickly within the limited time frame they have.