Answer:
Nicotine
Explanation:
Smokeless tabacco may not damage your lungs but still has nicotine so it gives you the same addiction and withdraws when you try to quit.
I believe the answer is D. fats and oils.
D.) Keep your head up while your skating.
Probably around the neck area, since the blood vessels are there. It would still be painful since you are basically gasping for air.
