Answer:
To hide from predators
Explanation: Butterflies with wings that look like leaves are less likely to be eaten by predators, such as small birds like sparrows or finches. An example of a butterfly with leaf like wings is the Indian leaf butterfly (Kallima paralekta). It happens through natural selection, and while on the outside they resemble a dead leaf, on the inside they have a variety of colors like bright oranges, blues, and blacks.