Correct Answer: dormitory

Solution : The correct choice is the third option.

Explanation:
A dormitory is a large bedroom-like space specifically designed in institutions such as schools, colleges, or hostels to accommodate multiple people, usually students. It's a communal sleeping area where individuals have their own beds or sleeping spaces within the larger room.

The meanings of the other options are as follows:

• Auditorium: A large room or hall used for performances, presentations, or gatherings.
• Apartment: A self-contained housing unit usually within a larger building, typically for one family or individual.
• Chamber: A room used for a specific purpose or by a particular group of people, often associated with official or professional settings.

Therefore, the correct answer is dormitory.