Juvenile delinquency refers to illegal acts committed by minors. Some key factors that may contribute to delinquent behavior include poverty, family problems, low intelligence, hyperactivity, and social learning by imitating criminal behavior. Common delinquent acts include substance abuse, gang involvement, vandalism, and early sexual activity. Interventions to address delinquency include juvenile courts, special school facilities, family support, rehabilitation facilities, and community programs. While complete prevention is unrealistic given research finding 20% of youth offend, societies aim to curb delinquency over time.