Explain how retailers help enforce the rule of not selling tobacco products to
minors (How does the cashier know if one is old enough to purchase cigarettes)?

they ask for your ID, if you’re old enough u can purchase it but if you don’t have one or aren’t old enough, they tell u that u cannot purchase them

Explanation:

They must check the ID.

Explanation:

The cashier selling the tobacco products must ask the costumer to show their ID before allowing them to purchase the tobacco. Depending on where you live you have to be 21. (Like I said it depends on where you live.)