No, it's saying "the other results, which are Spice IA's, define their own query space because they provide their own triggers".

If it's that confusing the para should be like this:

"DuckDuckGo's itnernal processes determined that the About, Images, Video, and Meanings results should be displayed, given the query and the relevancy of their results. The other results (tabs?), are Spice Instant Answers which were added to the AnswerBar because they each define their own query space with their (triggers)[triggers]"