question: What sentence would provide a factual answer to this question: "Polar bears live in"

answer: polar bears live in cold environments

question: What sentence would provide a factual answer to this question: "What purpose does a plant light serve?"

answer: a plant requires sunlight to grow

question: What sentence would provide a factual answer to this question: "A pile of mulch is broken down and when searching for the culprit, a gardener notes"

answer:
decomposer is a kind of role in an ecosystem