Ventilators are systematically provided near the roof or top of a room because:
- Ato bring oxygen for breathing.
- Bso that sunlight may enter the room.
- Cto maintain convectional currents to keep the air fresh in the room.
- Dto provide an outlet for carbon dioxide.
Solution & Step-by-step Explanation
Air that is exhaled or warmed up by human presence inside a room becomes less dense and rises upward. Providing ventilators near the ceiling allows this warm, stale air to escape, while cooler, fresher, and denser outside air flows in through low-level windows and doors, maintaining steady convection currents.