question: What sentence would provide a factual answer to this question: "What are sources of shelter for small animals?"

answer: rocks are a source of shelter for small animals in an environment

question: What sentence would provide a factual answer to this question: "coal is a resource that"

answer: coal is a nonrenewable resource

question: What sentence would provide a factual answer to this question: "A telescope is required for detailed observation of what?"

answer:
detailed observation of celestial objects requires a telescope