Explanation:

A "sin tax" is an excise tax placed on certain goods at the time of purchase. The items subject to this tax are perceived to be either morally suspect, harmful, or costly to society. Examples of sin taxes include those on cigarettes, alcohol, gambling, and vaping.

If a sin tax is placed on sales of alcohol, the supply curve shifts to the left. A sin tax is a sales tax, usually imposed at the point of sale. A sales tax is treated like an input cost, so the supply curve shifts left.