What is meant by "underage drinking"?

Underage drinking specifically refers to the act of consuming alcohol by individuals who are below the legal drinking age defined by law, which is typically 21 years old in the United States. This definition is critical in understanding legal and health implications, since drinking alcohol at a young age can lead to various negative outcomes, including impaired development, increased risk of addiction, and legal consequences for both the minors and those who provide alcohol to them.

Understanding the correct context of underage drinking allows for better policy enforcement, education on responsible drinking, and the health risks associated with alcohol consumption before reaching the legal age. The other options do not accurately describe the situation; they either imply legality based on age or parental consent, which does not reflect the primary concern of underage drinking laws.