The correct life cycle is option 'D': Egg-caterpillar-pupa-butterfly.

Explanation:
Eggs are the first stage of a butterfly's life cycle. The female butterfly lays eggs on plants, typically on the underside of leaves. Each egg is tiny and usually round or oval in shape. The eggs are often laid in clusters.

Once the eggs hatch, caterpillars emerge. Caterpillars are the larval stage of a butterfly. They are small, worm-like creatures with a soft body and several pairs of legs. Caterpillars are voracious eaters and spend most of their time feeding on leaves and plants to grow.

After the caterpillar has grown to its full size, it forms a protective covering around itself called a pupa or chrysalis. Inside the pupa, the caterpillar undergoes a process called metamorphosis, where it transforms into an adult butterfly. This stage is also known as the transformation stage.

Finally, the adult butterfly emerges from the pupa. It takes some time for the butterfly's wings to expand and dry before it can fly. Once the wings are fully developed, the butterfly is ready to explore its surroundings and begin its adult life.

Key Points:
- Eggs are the first stage of a butterfly's life cycle.
- Caterpillars are the larval stage of a butterfly.
- Pupae or chrysalis is the protective covering formed by the caterpillar.
- The pupa undergoes metamorphosis, transforming into an adult butterfly.
- The adult butterfly emerges from the pupa and has fully developed wings.

The life cycle of a butterfly is a fascinating process of transformation and growth. It showcases the different stages a butterfly goes through before reaching adulthood. Each stage serves a specific purpose in the butterfly's development and contributes to its overall life cycle.

Yes , D is the correct answer because it is the correct life cycle .