question: Creatures with feathers and wings have a large brain relative to the size of their what?
choices.text: fur eyes lemurs bats humans body brain wings
choices.label: A B C D E F G H
formatted_question: Creatures with feathers and wings have a large brain relative to the size of their what? (A) fur (B) eyes (C) lemurs (D) bats (E) humans (F) body (G) brain (H) wings