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 - disease linked to smoking that causes permanent lung damage. Dental decay is related to oral hygiene and diet, type 2 diabetes has multiple risk factors not directly lung - related from smoking, and stroke is mainly related to blood vessels and circulation issues rather than direct lung damage from smoking.

Answer:

emphysema