Question

which of these is a smoking - related disease that causes permanent damage to the lungs?
emphysema
dental decay
type 2 diabetes
stroke

Explanation:

Emphysema is a lung - related disease caused by smoking that leads to permanent lung damage. Dental decay is related to oral hygiene and diet, type 2 diabetes has multiple risk factors like genetics and lifestyle but not directly lung - specific smoking damage, and stroke is related to blood vessels in the brain and not specifically lung damage from smoking.

Answer:

emphysema