question: What sentence would provide a factual answer to this question: "energy is required for survival, and this is primarily delivered by"

answer: the sun is the source of energy for life on Earth

question: What sentence would provide a factual answer to this question: "If an organism dies what happens to that organisms population?"

answer: if an organism dies then the population of that organism will decrease

question: What sentence would provide a factual answer to this question: "Recycling happens"

answer:
An example of recycling is using an object to make a new object