question: What sentence would provide a factual answer to this question: "An animal needing to be warmer could"

answer: fat is used to keep animals warm

question: What sentence would provide a factual answer to this question: "Reptiles may actually be"

answer: reptiles lay eggs

question: What sentence would provide a factual answer to this question: "Deserts, Jungles, and Oceans have many different"

answer:
an ecosystem contains a large community of living organisms in a particular place