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.

[EX Q]: Question: Which characteristic of motion could change without changing the velocity of an object?
[EX A]: characteristic, motion, change, without, changing, velocity

[EX Q]: Question: All known living things are made up of ___. (A) eggs (B) cells (C) cell walls (D) gelatin?
[EX A]: living, things, made

[EX Q]: Question: Lona wants to make an inference about the mass of an object on her desk. The best way to determine the mass would be to ___. (A) lift the object (B) touch the object to feel if it is warm (C) observe the color of the object (D) see if the object attracts a magnet?
[EX A]:
inference, object, determine, mass