question: What sentence would provide a factual answer to this question: "When taking a pickax to rocks"

answer: breaking apart rocks can cause debris

question: What sentence would provide a factual answer to this question: "A cup of hot tea next to a glass of iced tea will make which become colder?"

answer: as heat is transferred from something to something else , the temperature of that something will decrease

question: What sentence would provide a factual answer to this question: "Where would a greenhouse best be used?"

answer:
a greenhouse is used to protect plants by keeping them warm