question: What sentence would provide a factual answer to this question: "What harmful phenomenon can cause atmospheric warming?"

answer: as the amount of polluting gasses in the atmoshere increases , the atmospheric temperature will increase

question: What sentence would provide a factual answer to this question: "If Earth has poles that are magnetic"

answer: a compass 's needle lines up with Earth 's magnetic poles

question: What sentence would provide a factual answer to this question: "Which item can help someone who is trying to conserve?"

answer:
An example of conservation is avoiding waste