question: What sentence would provide a factual answer to this question: "The Earth's primary source of both light and heat is"

answer: the Sun is the star that is closest to Earth

question: What sentence would provide a factual answer to this question: "How long might a bear likely to remain its den without eating, drinking, or excreting after November?"

answer: hibernation is used for conserving resources by some animals

question: What sentence would provide a factual answer to this question: "A bear in the arctic can go a long time without eating"

answer:
an animal can survive in an environment with little food by storing fat