Final answer:
The sites that establish a presence on the web without offering transaction opportunities, even though the product could be sold that way, are known as informational websites.
Step-by-step explanation:
The sites that establish a presence on the web without offering transaction opportunities, even though the product could be sold that way, are known as informational websites. These websites provide valuable information about the product or service, but do not facilitate direct transactions. Instead, they may provide contact information for further inquiries or offline purchases. For example, a luxury car company may have an informational website that showcases their models, features, and specifications, but directs potential buyers to visit a dealership for purchasing.