Why is pink or purple a color for girls and blue or brown for boys？

The answer depends largely （16）___ cultural values as well as personal experiences．To the Egyptians，green was a color （17）___ represented the hope and joy of spring，while for Muslims，it means heaven．Red is a symbol of good luck in many cultures．During the Spring Festival in China，children （18）___（give） money in a red envelope to bring good fortune in the New Year．For many nations，blue is a symbol of protection and religious beliefs．Greek people often wear a blue necklace hoping to protect （19）___ against evils（灾祸）．

People's （20）___（choose） of colors is also influenced by their bodies'reactions toward them．Green is said to be （21）___ most restful color．It has the ability to reduce pain and relax people both mentally （22）___ physically．People （23）___（work） in green environment have been found to have fewer stomach aches．

Red can cause a person's blood pressure to rise and increase people's appetites（食欲）．Many decorators will include different shades of red in the restaurant．（24）___（similar），many commercial websites will have a red"Buy Now"button because red is a color that easily catches a person's eye．

Blue is another calming color．Unlike red，blue is believed to cause people to lose appetite．So （25）___you want to eat less，some suggest that eating from blue plates can help．