The first two words are related to each other in some way. You are to see what the relation is between the first two words and find the one word that is related in the same way to the third word.
wire: electricity
pipe: _________
answer choices: wipe, tube, water, stem, plumber
frog: amphibian
whale: _________
answer choices: fish, oil, mammal, elephant, whole
beacon: helmsman
wisdom: _________
answer choices: ruler, tooth, sagacity, wizard, grief