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?"

Fact: animals without backbones are just as nutritious.
What are just as nutritious as animals without backbones?

Fact: Electrical currents can cause objects to repel each other.
Which of the following can cause objects to repel each other?

Fact: hiding can be used for staying away from predators.

What is hiding used for?