question: What sentence would provide a factual answer to this question: "What fails to work during a power outage?"

answer: electrical devices convert electricity into other forms of energy

question: What sentence would provide a factual answer to this question: "A person wants to use a ruler to measure something so they measure"

answer: a ruler is used for measuring the length of an object

question: What sentence would provide a factual answer to this question: "the moon 's surface contains many"

answer:
the moon 's surface contains many craters