question: What sentence would provide a factual answer to this question: "A person may celebrate an equinox"

answer: an equinox occurs twice per year

question: What sentence would provide a factual answer to this question: "What loosens soil?"

answer: tunnels in soil loosen that soil

question: What sentence would provide a factual answer to this question: "A brick wall stops"

answer:
no light shines through an opaque object