The natural world is full of colors, seen in humans, plants, and animals. Human skin comes in different shades (色块), which is influenced by sunlight, emotions, and health. When we feel strong emotions like anger or excitement, our skin can turn red as a result of increased blood flow to the face. Therefore, people often say “seeing red” when someone is angry.
Plants also use colors to survive. Flowers have bright colors to attract insects like bees, which help with pollination (授粉) by moving pollen from one flower to another. Bees can see colors we can’t, so they’re attracted to these bright flowers, which is important for the plants’ reproduction. Without bees, many plants would struggle to survive.
Animals also use colors for survival. Some change their fur or skin colors to blend in with their surroundings and avoid being seen by predators (捕食者). For example, the snowshoe hare changes its fur from brown in the summer to white in the winter to match the snow. Others use bright colors to warn predators to stay away.
In summary, colors play many roles in the natural world. They contribute to the beauty of our planet and are helpful for life to thrive. From the different tones of human skin to the bright colors of flowers and the pretending strategy of animals, the role of color in nature is fascinating and important.
【小题1】Which is NOT the cause to change human skin color according to the passage?
| A．Sunlight exposure. | B．Emotional intensity. |
| C．Health conditions. | D．Facial expressions. |
【小题2】Why do flowers have bright colors as mentioned in the passage?
| A．To make them easier to move. | B．To attract insects for pollination. |
| C．To protect them from predators. | D．To keep them warm in cold days. |
【小题3】How do some animals use colors as a survival strategy according to the passage?
| A．By changing colors to match with predators. |
| B．By using bright colors to attract some mates. |
| C．By using colors to keep away from predators. |
| D．By changing colors to show different feelings. |
【小题4】What is the main idea of the passage?
| A．Nature is beautiful because of its colors. |
| B．Flowers need insects to survive well. |
| C．Animals change colors to avoid predators. |
| D．Colors serve important functions in nature. |
【小题5】How is the information organized in this passage?
| A．By listing examples of colors in some dangerous situations. |
| B．By discussing the history of colors development in humans. |
| C．By comparing the colors of plants, animals, and humans. |
| D．By showing different roles of colors in the natural world. |
