question: What sentence would provide a factual answer to this question: "Materials like ethanol are used to produce electricity by _____."

answer: biofuel is used to produce electricity by burning


question: What sentence would provide a factual answer to this question: "Even items such as rocks mass can be changed due to which process?"

answer: weathering means breaking down surface materials from larger whole into smaller pieces by weather


question: What sentence would provide a factual answer to this question: "When rain falls for two solid weeks, flooding will be evident"

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