question: What sentence would provide a factual answer to this question: "What is the source of energy for physical cycles on Earth?"

answer: the sun is the source of energy for physical cycles on Earth

question: What sentence would provide a factual answer to this question: "The deforestation can be the cause of what occurrence?"

answer: if a tree is cut down then that tree will die

question: What sentence would provide a factual answer to this question: "Heavy rains cause flooding which"

answer:
heavy rains cause flooding