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?"
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Question: Fact: sea creatures live in reefs.

Answer: where do some sea creatures live?


Question: Fact: digestion makes it possible for an animal to move.

Answer: what makes it possible for an animal to move?


Question: Fact: sand dunes can be formed by pressure differences.

Answer:
Sand dunes can be formed by?