Sports Lab would like to show their ad to shoppers who view the detail pages of products similar to yours.

The correct answer is substitution. Substitution targeting allows your ad to appear on the detail pages of products that are similar to yours, meaning they could be considered alternatives or replacements for your product. This strategy aims to capture shoppers who are actively browsing competing or comparable items. Complements targeting would show your ad on detail pages of products that are often bought with yours, not instead of yours. Loose match and close match are not standard targeting options within this context; they are more commonly associated with keyword matching strategies, not product detail page targeting.