Analogies questions are based on logic and English Vocabulary. A variety of logical relationships are found in a pair of words in the questions.
Once you become familiar with their format, you’ll find that Analogy questions are pretty straightforward and very predictable. In fact, prepping often gains you more points on Analogies than on any other Verbal question type. With practice, you can learn to get them right even when you don’t know all of the vocabulary words involved.