The fact that people who are physically dependent on one substance (such as nicotine) are more likely to be addicted to others as well (such as alcohol) provides support for a(n) ______ model of addiction.

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The fact that individuals who are physically dependent on one substance (such as nicotine) are more likely to develop addiction to others (such as alcohol) supports the reward model of addiction, which posits that addictive substances activate the brain's reward system, leading to a cycle of continued use and dependence. This model emphasizes the role of dopamine, a neurotransmitter that is released in response to pleasurable stimuli, in reinforcing addictive behaviors. Thus, individuals who are more sensitive to the rewarding effects of one substance may be more likely to seek out and become addicted to others as well.

The Fact That People Who Are Physically Dependent on One