Which of the following pathophysiological mechanisms that occur in the lung parenchyma allows pneumonia to develop?

Inflammation

The most common feature of all types of pneumonia is an inflammatory pulmonary response to the offending organism or agent. Atelectasis and bronchiectasis indicate a collapse of a portion of the airway that doesnt occur with pneumonia. An effusion is an accumulation of excess pleural fluid in the pleural space. which may be a secondary response to pneumonia.