Final answer:
A standard drink is a specific amount of an alcoholic beverage that is used to measure alcohol consumption.
Step-by-step explanation:
A standard drink is a specific amount of an alcoholic beverage that is used to measure alcohol consumption. According to the information provided, a standard drink is defined as 12 ounces of beer, 5 ounces of wine, or a 3-ounce shot of liquor. These measurements help individuals understand the amount of alcohol they are consuming and can be useful in practicing moderation and responsible drinking.