Question

what is the poisonous substance responsible for many of the addictive qualities of tobacco?
o carcinogens
o nicotine
o thc
o hydrocodone

Explanation:

Nicotine is the substance in tobacco that causes addiction. Hydrocodone is a pain - relieving opioid not related to tobacco. THC is the psychoactive component of marijuana. Carcinogens are cancer - causing substances in tobacco but not responsible for addiction.

Answer:

Nicotine