question: What sentence would provide a factual answer to this question: "What is more likely to have caused pollution in the air?"

answer: humans cause pollution

question: What sentence would provide a factual answer to this question: "For nutrients to be absorbed from food it needs to"

answer: the digestive system digests food for the body

question: What sentence would provide a factual answer to this question: "pollution is when humans pollute the environment with"

answer:
pollution is when humans pollute the environment with pollutants