Q: Emphysema is a chronic disease caused by the breakdown of the what tissue?


Read this paragraph and choose the correct option from the provided answers:

Emphysema is a chronic lung disease caused by the breakdown of the lung tissue. Symptoms of emphysema include shortness of breath, especially during exercise, and chronic cough, usually due to cigarette smoking, and wheezing, especially during expiration. Damage to the alveoli ( Figure below ), is not curable. Smoking is the leading cause of emphysema.

 Choices:

- heart

- liver

- brain

- lung


A:
lung