What is closest to the Alevoli Trachea bronchus bronchiole or Pharynx?

The bronchiole is closest to the alveoli, as it is part of the branching structure of the respiratory system that leads directly to the alveoli, where gas exchange occurs. The trachea and bronchus are larger airways that lead to the bronchioles, while the pharynx is part of the upper respiratory tract and is further upstream in the airway pathway.