Teenagers are not part of the market for alcohol because they do not have .

the authority to buy alcohol

Explanation:

A teenager can also be referred to as a teen or an adolescent. And is a person who falls within the ages of 13 to 19 years old.

In most countries of the world, especially in the United states of America, the teenagers are ban from going out publicly to buy alcohol. This means that they do not have the authority to buy alcohol.

This is because , they are still believed to be in the developmental stage, and are not ready or won't be able to handle the aftermath effect of alcohol.