Generate a sentence that answers this question: "The purpose of bird feathers, especially down, is to".

Answer: down feathers are a thermal energy insulator

Generate a sentence that answers this question: "What weather phenomena can crack your windshield?".

Answer: precipitation is when hail fall from clouds to the ground

Generate a sentence that answers this question: "Which would create the most pollution".

Answer:
polluting means something poisonous is added to an environment causing harm to the environment