Final answer:
Quitting tobacco use is difficult because nicotine is so addictive.
Step-by-step explanation:
Quitting tobacco use is difficult because nicotine is so addictive. Nicotine is the main addictive substance found in tobacco products, and it acts on the brain to produce pleasurable feelings and cravings. When someone tries to quit, they may experience withdrawal symptoms such as irritability, anxiety, and difficulty concentrating. These symptoms can make it challenging to quit tobacco use.
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