greatly the development of human beings, animals and plants, because it is generally known, that only the strongest, fastest and cleverest survive in this world. For example, animals which live in the North and possess black fur have very low chances to survive, that is why most animals, including polar bears, seals possess white fur and can easily hide on the white background of snow. The color of skin and fur is very important for survival, because it enables animals to hide, protect themselves or hunt…
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