Which type of cheese is associated with "Bleu" dressing?

Bleu dressing is specifically named for its use of bleu cheese, which is a type of cheese known for its strong flavor and distinctive blue or green marbling. This cheese is made from cow's, sheep's, or goat's milk that has been inoculated with Penicillium mold, giving it a unique taste and aroma. Bleu cheese adds a creamy, tangy element to dressings, making it a popular choice for salads, particularly those featuring stronger flavors like steak or bacon. The other cheese types listed, such as cheddar, parmesan, and pepper jack, do not carry the same flavor profile or characteristics that define bleu dressing, making bleu cheese the correct choice in this context.