question: What sentence would provide a factual answer to this question: "What happens when molten lava comes into contact with a car?"

answer: melting point means temperature at which a solid melts

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: "An early example of harnessing wind power would be"

answer:
wind is a source of energy