When a person smokes a cigarette, what remains on the lungs
a. tar
b. alcohol
c. nutrients
d. iron
(plz

The answer is A (Tar).

Tar appears on lungs when somebody smokes cigarettes.

I'm 100% correct, I've learned about this for years. Hope this helps!

The answer to this question is A) Tar.

When a person smokes, tar starts building up on the lungs. Which is very dangerous, smoking does not have any good effects on your lungs.

A) Tar. When a person smokes, tar starts building up on the lungs.

B) Alcohol. Alohol does not build up on the lungs from smoking.

C) Nutrients. Smoking does not cause nutrients to build up on the lungs.

D) Iron. Iron does not build up on the lungs.

I hope this helps! :)

Have a wonderful day!

-LizzyIsTheQueen

answer(b) keep oxygenated and deoxygenated blood separate;