question: What can be heard when it reaches our ears?
choices.text: feedback vibrations very complex animals amount of heat movement air pollution Pacific
choices.label: A B C D E F G H
fact2: When the vibrations reach our ears, they are changed into sounds.
combinedfact: When vibrations reach our ears, they can be heard.
formatted_question: What can be heard when it reaches our ears? (A) feedback (B) vibrations (C) very complex (D) animals (E) amount of heat (F) movement (G) air pollution (H) Pacific