An analogy compares two pairs with the same relationship: A is to B as C is to D. Put the first relationship into a short sentence, then test it on each option.
1Common relationships
Part to whole (page : book)
Tool to user (needle : tailor)
Instrument to what it measures (thermometer : temperature)
Degree or intensity (plummet : fall)
Opposites and synonyms
Number relations (square, cube, multiple)