question: Given the fact "thick feathers can be used for keeping warm", what is the answer to "Thick feathers can be used for"

answer: staying weatherproof, flexible and free of bacteria

question: Given the fact "an animal requires nutrients for survival", what is the answer to "What does an animal require to survive?"

answer: nutriment

question: Given the fact "the cell membrane provides support for a cell", what is the answer to "What prohibits cells from contorting into deformed shapes?"

answer: the thin membrane which surrounds them

question: Given the fact "the Appalachians were formed by rock folding", what is the answer to "The Appalachians reach amazing heights because of how stone"

answer:
piles together