The question's clues are:
1) It gets service objects
2) Reduces network traffic (by caching service objects, by the way)
3) Paired with Business Delegate
Clues 1 and 3 are dead giveaways for Service Locator. Clue 2 is most likely to describe a Transfer Object, but clues 1 and 3 don't make sense for Transfer Object at all.
I really recommend using my notes as a
supplement to your patterns studies. My notes don't really explain the patterns in detail -
you should learn that from a book or from the core patterns website (link can be found in my notes).