Final answer:
To deter a peer from using marijuana, educate them on its effects and legal repercussions.
Explanation:
To convince a peer not to use marijuana, you could educate them on the short-term and long-term effects of marijuana use. Highlight that marijuana can impair cognitive function, affect memory, and lead to addiction, impacting their academic performance and overall health.
Another way is to emphasize the legal consequences of using marijuana. Mention that possession of marijuana is illegal in many places and can result in legal penalties, affecting their future opportunities such as job prospects and travel.
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