Which of the following ingredients is used in the King Crab Dip?

The King Crab Dip commonly features Parmesan as one of its key ingredients due to its strong flavor and creamy texture. Parmesan adds a rich and nutty complexity that complements the sweetness of the crab meat, enhancing the overall taste of the dip. Its ability to melt well and blend seamlessly with other ingredients makes it a popular choice in many creamy seafood dishes.

The other ingredients listed, such as Gruyere, Feta, and Ricotta, while delicious in their own right, do not typically align with the traditional flavor profile and texture desired in a King Crab Dip. Gruyere has a more pronounced flavor that could overpower the delicate taste of the crab, while Feta's saltiness and crumbly texture may not provide the creamy richness generally sought in a dip. Ricotta, being more mild and creamy, doesn't provide the depth of flavor that Parmesan does in this specific dish.