Final answer:
Resident bedrooms are required to have at least one egress window or door to the outside for safety, and a stable, level floor. The importance of these features is underscored by historical and contemporary housing examples that emphasize the need for adequate air, light, and safety.
Step-by-step explanation:
The student's question is asking for specifics about the necessary architectural features of a residential bedroom. The standard building requirement is that resident bedrooms must have at least one egress window or door to the outside to allow for an emergency exit, as well as a floor that is stable and level.
The various descriptions provided reference several important elements of room design that contribute to habitability and safety, such as access to air and light (big, airy room with windows that look all ways), safety features (windows are barred for little children), and the importance of windows for light and emergency exits. The descriptions also touch upon different housing configurations portraying how air and daylight access can vary depending on the social and economic status as well as the era and location.