question: What sentence would provide a factual answer to this question: "Why is acid rain unhealthy?"

answer: acid rain has a negative impact on water quality

question: What sentence would provide a factual answer to this question: "Which has a child that will miss out on being a pupa?"

answer: the pupa stage is a stage in the metamorphosis process of some animals

question: What sentence would provide a factual answer to this question: "A person wanting to find a live bear in a forest will have difficulty because bears"

answer:
animals usually distance themselves from humans