In aerial animals, limbs are modified as wings. This adaptation allows them to fly and navigate through the air. Let's explore this further:

1. Limbs as Wings:
Aerial animals such as birds, bats, and insects have limbs that are specifically modified into wings. These wings are specialized appendages that enable them to produce lift and propel themselves through the air. Wings are generally formed by elongated forelimbs, which have undergone specific adaptations for flight.

2. Bird Wings:
Birds have the most well-developed wings among aerial animals. Their forelimbs are modified into wings, which are covered in feathers. The bones in their wings are lightweight and hollow, reducing weight and improving flight efficiency. The feathers provide both lift and propulsion during flight.

3. Bat Wings:
Bats are the only mammals capable of sustained flight. Their wings are formed by a thin membrane of skin, known as the patagium, which stretches between elongated finger bones. This adaptation allows bats to have greater maneuverability in flight compared to birds.

4. Insect Wings:
Insects, such as butterflies, bees, and flies, have two pairs of wings. These wings are attached to the thorax and are composed of a thin, transparent membrane supported by a network of veins. Insect wings can beat rapidly, allowing them to hover, maneuver, and fly in various directions.

5. Flight Adaptations:
The wings of aerial animals are designed for different types of flight. Some birds have long, pointed wings for soaring and gliding, while others have short, rounded wings for quick bursts of flight. Bats have flexible and maneuverable wings, while insect wings can beat rapidly to generate lift.

Overall, the modification of limbs into wings is a remarkable adaptation that allows aerial animals to conquer the skies. This adaptation has enabled them to explore diverse habitats, search for food, escape predators, and migrate over long distances. By having limbs modified as wings, these animals have evolved a unique and efficient way to navigate and survive in their aerial environment.

C) Limbs are modified as wings