What process describes the transformation of a caterpillar into a butterfly?

The transformation of a caterpillar into a butterfly is known as metamorphosis. This process involves distinct stages of development, which include the egg, larva (caterpillar), pupa (chrysalis), and adult butterfly. During metamorphosis, the caterpillar undergoes significant physical changes, culminating in the emergence of a fully formed butterfly. This biological transformation is a key feature of the life cycle of many insects, including butterflies.

In contrast, the other options do not accurately describe the process. A metaphor refers to a figure of speech where one thing is described as if it were another, which is unrelated to biological transformations. Migration involves the movement of organisms from one place to another, often for breeding or seasonal changes, and does not pertain to the development stages of a butterfly. Evolution, while related to the broader topic of species change over time, refers to the gradual development of species and does not illustrate the specific developmental stages experienced by a butterfly. Therefore, metamorphosis is the specific term that describes the caterpillar's transformation into a butterfly.