Predator avoidance is a term that refers to an organism's ability to avoid becoming prey. There are many synonyms for this concept, including predator evasion, predator defense, and predator escape. Other ways to express the same idea include predator deterrence, predator resistance, and predator survival tactics. In the animal kingdom, predator avoidance takes many forms, including camouflage, mimicry, speed, agility, and the ability to blend in with surroundings. Survival against predators often determines the outcome of an organism's life, so predator avoidance is a critical aspect of evolution and natural selection. Ultimately, a host of techniques are available to enable animals to evade or deter predators and survive in the world of nature.