Final answer:
The term "gateway drug" refers to the theory that marijuana use can potentially lead to the use of more dangerous and addictive substances. However, this theory is controversial and not universally accepted.
Step-by-step explanation:
The term "gateway drug" refers to the theory that marijuana use can potentially lead to the use of more dangerous and addictive substances. This concept suggests that trying marijuana might open the door to experimenting with harder drugs. However, it is important to note that this theory is controversial and not universally accepted. The gateway theory posits that using marijuana could lead to increased tolerance and curiosity towards other substances, but it does not mean that everyone who uses marijuana will necessarily progress to using harder drugs.
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