question: What sentence would provide a factual answer to this question: "The skeletal system"

answer: skeletal system is made of bones

question: What sentence would provide a factual answer to this question: "What does the earth orbit that causes the seasons to change?"

answer: seasonal changes are made in response to changes in the environment

question: What sentence would provide a factual answer to this question: "You can easily scratch a windshield with"

answer:
quartz scratches glass easily