Smoking causes direct damage to the lungs.
Smoking is the inhalation and exhalation of the fumes of burning tobacco.
Inhaling and exhaling fumes of burning tobacco causes direct lung damage.
Inhaling and exhaling fumes of burning tobacco causes damage to what, directly?
[a] health
[b] lungs
[c] spleen
[d] fingers
[e] cells
[f] tissue
[g] liver
[h] plants