SAT Vocab Builder

Answer: Choice (C) is correct.

A confluence means joining together or meeting, so look for the pair that has a similar relationship. In choice (A), a labyrinth is a tangled maze, which does not have a clear path. These words do not have the same relationship as confluence and rivers. A locomotive runs on a track, but is not closely related in the same way as the first part of the analogy. Skyscrapers may be part of a metropolis, or a large city, but it does not have anything to do with joining together or meeting. The only pair the has the relationship of coming together is junction and highways, so choice (C) is correct.