Final answer:
Teen drug use is influenced by family, social, and cultural factors, with family being a significant influence.
Step-by-step explanation:
Drug use by teens is influenced by family, social, and cultural factors. Family can provide the initial environment and attitudes towards drugs, social influences include peers and the wider community attitudes, and cultural factors encompass the beliefs, values, and norms that shape an individual's behavior and attitudes towards drugs. Moreover, it is important to note that family is often considered the most significant influence on an individual's behavior, including their approach to drug use.