Which option should you use to schedule a room for a service activity?

The correct choice is Facility, as it specifically refers to the physical locations or rooms that are available for scheduling in service activities. In the context of Dynamics 365 Customer Service, a facility represents a resource that can be reserved for meetings, service appointments, or other activities requiring a physical space. By selecting a facility, you can effectively manage the logistics of service activities, ensuring appropriate resources are allocated for optimal service delivery.

Using the other options would not fulfill the requirement for scheduling a room. An Account typically pertains to the business or organization you are working with, and while it may have associated locations, it does not designate a specific room for scheduling. A Contact represents an individual person and is related to communication but lacks the context of physical space management. Meanwhile, a Crew usually refers to a group of individuals or workforce assigned to complete a task or service, rather than a physical location needed for the service activity. Therefore, selecting a Facility is the most accurate and effective choice for scheduling a room in this scenario.