fact and question: if something is a raw material in a process then that something is required for that process
Question: A person needs to use a raw material to cool an engine, so they might use

What's the answer?

answer: H2O in a jug

fact and question: fat is used to keep animals warm
Question: Why would a bear eat so much that his fat wobbles when he walks?

What's the answer?

answer: to prepare for the snowy season

fact and question: an animal requires oxygen for to breathe
Question: A dog can breathe

What's the answer?

answer: in a church

fact and question: dead organisms decay
Question: Which is likeliest to decay?

What's the answer?

answer:
a rhinoceros