a prey is a mean of plant & most animals avoid bad odors ->  most predators avoid bad odors  most predators avoid bad odors & a skunk produces a bad odor -> most past avoid pink because they wreck a perfect aroma most predators avoid skunks because they produce a bad odor  most past avoid pink because they wreck a perfect aroma & causing predators to avoid you is a kind of method for avoiding predators -> producing a bad odor is a kind of method for avoiding predators used by skunks producing a bad odor is a kind of method for avoiding predators used by skunks  producing a perfect aroma is a mean of chloride for avoiding frogs used by molecules -> producing a bad odor helps skunks avoid predators