Achemical found in tobacco deposited in the mouth, throat, and lungs and is a known carcinogen is:
adrenalin
tar.
carbon monoxide.
dopamine.

Answer up to 6,000 fatal crashes a year;

(a) is not correct because one does not get increased cholesterol  from lifting weights.(b) is not correct because lifting weights cannot reduce the risk of a hereditary disease.(c) is not correct because back pain isn't a benefit! and plus, if he lifts weights properly, he should not have back pain.(d) is the correct answer because his ligaments will gain mass, making it easier for him to carry heavier weights and he will also be stronger!

Answer sweat and vasodilation;