Which of the following audiences based on shopping interactions can be used by an advertiser to either re-sell, cross-sell, or up-sell products?

The correct answer is Audiences from purchases because this audience type specifically consists of customers who have already made a purchase, making them prime targets for re-selling, cross-selling, or up-selling products. By understanding past purchasing behavior, advertisers can tailor their marketing strategies to offer related or upgraded products to these consumers, increasing the likelihood of additional sales. In contrast, audiences from keyword searches may indicate interest but do not guarantee past purchases, while audiences from product detail page views may show engagement without confirming a purchase, making audiences from purchases the most effective choice for these sales strategies.