question: Something that prevents injury by forming protective plates is made of what?
choices.text: Hair Protein Skin mineral Rock iron oxide a metal Keratin
choices.label: A B C D E F G H
fact2: Fingernails are also made of keratin.
combinedfact: Something made of keratin prevents injury by forming protective plates
formatted_question: Something that prevents injury by forming protective plates is made of what? (A) Hair (B) Protein (C) Skin (D) mineral (E) Rock (F) iron oxide (G) a metal (H) Keratin