Answer:
Because the elasticities of supply and demand measure how much market participants respond to market conditions, larger elasticities imply larger DW losses.
Step-by-step explanation:
As a tax grows larger, it distorts incentives more, and its DW loss grows larger. Because a tax reduces the size of the market, however, tax revenue does not continually increase. It first rises with the size of a tax, but if the tax gets large enough, tax revenue starts to fall.