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?"

[EX Q]: Fact: narcotic analgesics act on most invertebrates to relieve pain.
[EX A]: How do most analgesics work on invertebrates?

[EX Q]: Fact: Random changes in the genetic information of an organism creates a new genetic variation.
[EX A]: What happens when there are random changes in the genetic information of an organism?

[EX Q]: Fact: Oxygen in soil is higher when the soil has been eroded by wind.
[EX A]:
Oxygen amounts in soil is higher when soil has been eroded by what?