Final answer:
Peer pressure and peer approval are key influences that can increase a teenager's alcohol use.
Explanation:
Peer pressure and the desire for peer approval are significant factors that can potentially increase a teenager's alcohol use. Research has shown that adolescents often start drinking due to peer influence and the need to fit in with their social groups.
Learn more about Factors influencing teenage alcohol use here:
https://brainly.com/question/16630993
