Many people believe that how we express our feelings is mainly determined by our upbringing and culture. Undoubtedly, this is true in some cases. In North America, for example, it is customary to shake hands when we meet somebody to express acceptance, whereas in other countries they may simply bow slightly to indicate this. Many feelings, however, are expressed in similar ways by people all over the world. These emotions include fear, anger, happiness, disgust, and sorrow. For example, if a person is experiencing fear, his or her eyes will widen and the pupils will dilate. This reaction is largely involuntary. The finding that people express many feelings in a similar manner, regardless of where they are from, indicates that facial expressions are influenced more by evolution than culture.Based on the passage, it can be concluded that

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