Generate a sentence that answers this question: "A person discovers a dinosaur skeleton in their backyard under a lot of dirt. The skeleton is lacking the bright whiteness of bones, because it is".

Answer: fossils are formed when layers of sediment cover the remains of organisms over time

Generate a sentence that answers this question: "A switch turns something on because:".

Answer: pushing a button sometimes completes a circuit

Generate a sentence that answers this question: "Which is likely to occur as leaves fall off the trees and food becomes less plentiful?".

Answer:
seasonal changes are made in response to changes in the environment