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: results are unpredictable when a population suddenly gets much smaller.
what are the results when a population suddenly gets much smaller?

Fact: Something critical for regulating oxygen from hemoglobin may become unbalanced if the rate of breathing is too fast or too slow.
Something critical for regulating oxygen from hemoglobin may become unbalanced if breathing is what?

Fact: Migration is a type of movement that causes a population to fluctuate.

What can happen to a population when animals begin to migrate?