question: What sentence would provide a factual answer to this question: "Polar bears are best suited for"

answer: living in an environment causes an organism to adapt to that environment


question: What sentence would provide a factual answer to this question: "Which event can lead to the human caused change of an environment?"

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: "On what product might you find a reflector?"

answer:
a reflector is used to reflect light especially on vehicles