Which method of air distribution is characterized by natural or mechanical processes?

Ventilation is the method of air distribution that is characterized by either natural or mechanical processes. This involves the introduction and movement of fresh air into a space while removing stale or contaminated air. Natural ventilation relies on external air pressure differences, wind, and temperature differences to circulate air, often achieved through openings such as windows and vents. Mechanical ventilation, on the other hand, utilizes fans and blowers to actively move air, ensuring that a controlled flow of fresh air is available even in enclosed spaces.

This distinction is critical because effective ventilation is essential for maintaining indoor air quality, comfort, and health, particularly in environments such as homes, offices, and industrial settings. The other options relate to specific processes related to air handling but do not encompass the broad functionality of air distribution through the natural or mechanical manipulation of airflow.