Explanation:

Penguins are well adapted to their aquatic lifestyle and are known for their exceptional swimming abilities. There are several factors that contribute to their swiftness in water, and two of the key factors are their streamlined body and webbed feet.

Streamline body:
Penguins have a streamlined body shape, which helps reduce drag and allows them to move through the water with minimal resistance. Their bodies are elongated and tapered towards the back, similar to a torpedo. This shape helps them glide smoothly through the water, enabling them to swim swiftly.

Webbed feet:
Penguins have webbed feet, which are specially adapted for swimming. The webbing between their toes helps them generate more power and propulsion while swimming. The webbed feet act like paddles, pushing against the water and propelling the penguin forward. This feature allows them to swim efficiently and swiftly through the water.

Combination of streamline body and webbed feet:
The combination of a streamlined body and webbed feet makes penguins excellent swimmers. The streamlined body reduces drag, while the webbed feet provide the necessary propulsion to move swiftly in the water. These adaptations allow penguins to navigate through the water with agility and speed, enabling them to catch prey, escape from predators, and travel long distances in search of food.

Conclusion:
In conclusion, both the streamlined body and webbed feet of penguins contribute to their swiftness in water. The streamlined body reduces drag, while the webbed feet provide propulsion, making penguins swift swimmers. These adaptations are essential for their survival in their aquatic habitat.