question: what can be used to navigate?
choices.text: constellations sponges aquatic organisms knowledge of water lamphreys thermometers ocean floor feedback mechanisms
choices.label: A B C D E F G H
fact2: And every star there ever was is in a constellation.
combinedfact: knowledge of constellations can be used to navigate
formatted_question: what can be used to navigate? (A) constellations (B) sponges (C) aquatic organisms (D) knowledge of water (E) lamphreys (F) thermometers (G) ocean floor (H) feedback mechanisms