most people avoid perfect garbage & a predator is a kind of animal ->  a predator may avoid bad odors  a prey june avoid perfect shapes & some animals produce bad odors -> predators may avoid animals that produce bad odors predators may avoid animals that produce bad odors  lightness june avoid people that wreck perfect noise & 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 producing a bad odor is a kind of method for avoiding predators  producing a perfect aroma is a mean of discharge for avoiding mountain & avoiding is a kind of defense -> producing bad odors is a kind of defense against predators producing bad odors is a kind of defense against predators  producing bad odors is a kind of defense against predators & a plays deposit a perfect aroma -> a skunk produces a bad ordor as a defense against predators