Which adaptation allows an organism to blend in with its surroundings?

Which adaptation allows an organism to blend in with its surroundings? Camouflage. It helps an organism avoid detection by predators, sneak up on prey, or both.

Camouflage can involve color, pattern, shape, texture, behavior, or even light. A stick insect resembles a twig, a leopard’s spots break up its outline in dappled shade, and a flounder can match the seafloor. Some animals use countershading—dark on top and light underneath—to reduce the appearance of a three-dimensional body.

Camouflage is not always a permanent body feature. Chameleons and cephalopods can change color or pattern, while Arctic hares and some birds change coats or plumage seasonally. The change may be controlled by inherited traits, environmental cues, or behavior.

A common mix-up is assuming camouflage means becoming invisible or changing color only. In biology, the broader idea is concealment, also called crypsis. Its success depends on the habitat: an animal well hidden in one background may stand out sharply in another. The evolutionary advantage is strongest when camouflage improves survival and reproduction.