Write an incorrect answer to the given question based on the associated fact. You are also provided with the correct answer to the given question. Make sure that your incorrect answer is relevant and similar to the associated fact. Also, try to make the incorrect answer similar to the correct answer so that distinguishing the correct answer from the incorrect answer is not very easy. Make sure you don't accidentally provide another correct answer! Also, make sure they sound reasonable (e.g., might be on a school pop quiz). A good incorrect answer can be constructed using words associated with the question, but not the correct answer. For example, for the question "What helps plants survive?", using words like "weeds", "vase", "bee" (associated with "plant"), or "first aid", "parachute", "accident" (associated with "survive") etc. Your incorrect answers make the question hard, so these results in good incorrect answers.

Fact: exercise causes muscle fibers to get shorter. 
Question: What does exercise cause muscles to do? 
Correct Answer: Get shorter.
Get bent.

Fact: an element that can be sourced in forests can be cycled quickly between organisms and the atmosphere. 
Question: an element that can be sourced in forests can cycle how fast between organisms and the atmosphere? 
Correct Answer: quickly.
at a medium rate.

Fact: Absorption of magnesium occurs in the GI tract. 
Question: What is one thing that is absorbed in the GI tract? 
Correct Answer: magnesium.

neurons.