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: thirst is used to make chickens realize they need to replenish its bodily water.
what uses thirst to realize it needs to replenish its bodily water?

Fact: soil loss causes a river to become deeper and wider.
what loss causes a river to become deeper and wider?

Fact: Instincts help animals to attract a mate.

Instincts help animals to do what?