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: Which is a nonrenewable resource? (A) oil (B) trees (C) solar energy (D) food crops?

A: nonrenewable, resource?
****
Q: Question: Why do people often wear lighter colored clothing during the summer? (A) It allows more air to circulate and keeps them cool. (B) It absorbs more sunlight than darker clothing. (C) It allows less air to circulate and keeps them cool. (D) It reflects more sunlight than darker clothing.?

A: wear, lighter, colored, clothing, summer?
****
Q: Question: The sun is a star of average size and brightness. From Earth, the sun appears as a round, yellow object in the daytime sky. At night, we see other stars. They appear as tiny points of light. Why does the sun appear larger than stars that we see at night? (A) Daylight brightens the sun, making it appear larger. (B) Starlight bends as it passes planets, making the stars appear smaller. (C) The sun is closer to Earth than other stars, making the sun appear larger. (D) Earth's atmosphere filters out light from other stars, making them appear smaller.?

A:
sun, star, average, yellow, sky., sun, appear, larger, stars
****