Turn the given fact into a question by a simple rearrangement of words. This typically involves replacing some part of the given fact with a WH word. For example, replacing the subject of the provided fact with the word "what" can form a valid question. Don't be creative! You just need to rearrange the words to turn the fact into a question - easy! Don't just randomly remove a word from the given fact to form a question. Remember that your question must evaluate scientific understanding. Pick a word or a phrase in the given fact to be the correct answer, then make the rest of the question. You can also form a question without any WH words. For example, "A radio converts electricity into?"
--------
Question: Fact: the method used by cells to reproduce is how organisms grow and repair themselves.

Answer: the method used by cells to reproduce is how organisms grow and what?


Question: Fact: Keratin is used for feeling by animals.

Answer: What is used for feeling by animals?


Question: Fact: Air pollution damages animal populations causing them to decrease.

Answer:
What causes an  animal population to decrease?