Final answer:
The correct command to label an enclosed space like a kitchen in Revit is 'RoomTag'. This annotation provides information like the room's name or area, and it's accessible from the Annotate tab or when selecting the room.
Step-by-step explanation:
The command used in Revit to label an enclosed space such as a kitchen is RoomTag. When a room is created in Revit, it can be labeled with a RoomTag, which is a type of annotation that provides information about that room, such as its name, number, or area.
The RoomTag can be added by selecting the room and then choosing the Room Tag option from the Annotate tab or the contextual tab that appears when a room is selected.