You are given an elementary science question along with a few answer options. List all the words from the question that are essential and sufficient for choosing the correct answer option. Keep in mind that essential words are necessary to understand the meaning of the given question. However, non-essential words provide little information needed to select the correct answer. You can think about it like this: If the question was in another language, knowing the meaning of which words were necessary and enough for you to understand the question and answer it?. If your answer consists of multiple spans of words from the question, separate those using a comma (", "). Do not generate any word that is not present in the question. Make sure that your response is contained in the given question and the words are in the same order as the question.
 Grammatical correctness is not important.

[Q]: Question: Competition occurs constantly in all species. Which of the following is something that a plant is unlikely to compete for? (A) Space (B) Carbon dioxide (C) Sunlight (D) Pesticides?
[A]: plant, unlikely, compete


[Q]: Question: Which action will result in a product with new chemical properties? (A) shredding a newspaper. (B) breaking a mirror. (C) cutting wood. (D) popping popcorn.?
[A]: action, result, product, new, chemical, properties?


[Q]: Question: Electromagnets are used in many electric motors, generators, and simple devices. Electromagnets are much more useful than permanent magnets because unlike permanent magnets, electromagnets __________. (A) come in a variety of sizes (B) have an attractive force (C) have two magnetic poles (D) can be turned on or off?
[A]:
Electromagnets, useful, permanent, magnets