question: What sentence would provide a factual answer to this question: "We can help a plant by"

answer: In the photosynthesis process oxygen has the role of waste product

question: What sentence would provide a factual answer to this question: "Some animals change their appearance completely during a stage of the life cycle known as"

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

question: What sentence would provide a factual answer to this question: "At high elevations, there is little risk of flooding, but at low elevations, what will happen?"

answer:
as elevation of a place decreases , how much a flood will affect that place will increases