Final answer:
Asthma is the obstructive lung disease that is classified as reversible.
Step-by-step explanation:
The obstructive lung disease classified as reversible is asthma. Asthma is a chronic disease characterized by inflammation and edema of the airway, and bronchospasms (that is, constriction of the bronchioles), which can inhibit air from entering the lungs. In addition, excessive mucus secretion can occur, which further contributes to airway occlusion.