question: What sentence would provide a factual answer to this question: "If an environment experiences a long drought"

answer: if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water

question: What sentence would provide a factual answer to this question: "Which of these is warm-blooded?"

answer: a bird is warm-blooded

question: What sentence would provide a factual answer to this question: "In which situation would there be the greatest amount of humidity?"

answer:
humidity is the amount of water vapor in the air