What evaluates variables that search engines use to determine where a URL appears on the list of search results?

The correct answer is "Search engine ranking".  

Explanation:

The search engine is also known as an Internet search engine that is developed for searching the website or the web. The search engine is a type of software system. When we search anything into the web there are so many website or related links are appeared the Search engine ranking means on searching on the top which is appeared or which appeared in bottom simply it gives the position of the searching web.

The main objective of the Search engine ranking to determine where a URL appears on the list on searching into the web.

answer; i believe the correct answer is (psychological pricing);