Q: The techniques used to evaluate the hierarchy of a website are ____________________________.  

Card Sorting and Tree Testing.

Card sorting and tree testing are both techniques used to evaluate the information architecture and hierarchy of a website or application. Card sorting is a technique used to help design the information architecture of a website or application by allowing users to organize content into categories that make sense to them. Tree testing, on the other hand, is a technique used to evaluate the effectiveness of an existing information architecture by testing how easy it is for users to find specific pieces of content within the structure. By using both techniques, designers can ensure that the information architecture of a website or application is organized in a way that makes sense to users and is easy to navigate. Therefore, the correct answer is Card Sorting and Tree Testing.