动物在不同的自然环境中，为了生存它们会慢慢透过繁殖、变异而演化出形形色色功能不同的颜色，而这些颜色是由自然选择决定的。
dòngwù zài bùtóng de zìrán huánjìng zhōng ，wèile shēngcún tāmen huì mànmàn tòuguò fánzhí 、biànyì ér yǎnhuà chū xíngxíngsèsè gōngnéng bùtóng de yánsè ，ér zhèxiē yánsè shì yóu zìránxuǎnzé juédìng de 。
Animals living in different natural environments will mutate and evolve into having a variety of functions and different colors for their survival. These mutations are based on natural selection.