A proverb is a short sentence, usually known by a group of people, that is used to advice someone or to tell something about life.
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It means that you can show or bring someone a beneficial situation to take advantage of it, but you cannot force him/her to accept it or do it.
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C) is warmer than the north and south poles, is the answer. The sun's rays are perpendicular to the equator. It's because of this that the equator is the warmest area of Earth.