Explanation:

The correct answer to the given question is option 'C'.

In Class 1, students learn about different animals and their characteristics. Let's analyze each option to understand why option 'C' is the correct answer.

Option 'A': Elephant
- An elephant is a large animal with a long trunk and tusks.
- Elephants are herbivores and mainly eat leaves, bark, and fruits.
- They are found in Africa and Asia.
- Elephants are known for their intelligence and their ability to remember things for a long time.

Option 'B': Crocodile
- A crocodile is a large reptile with a long snout and sharp teeth.
- They are carnivorous and mainly eat fish, birds, and small mammals.
- They are found in rivers, lakes, and swamps.
- Crocodiles are known for their powerful jaws and their ability to stay underwater for a long time.

Option 'C': Penguin
- A penguin is a flightless bird that lives in cold climates.
- They have a thick layer of feathers that helps them stay warm in icy waters.
- Penguins are carnivorous and mainly eat fish and krill.
- They are found in the Southern Hemisphere, especially in Antarctica.

Option 'D': Giraffe
- A giraffe is a tall animal with a long neck and legs.
- They are herbivores and mainly eat leaves and fruits from trees.
- Giraffes are found in Africa.
- They are known for being the tallest animal in the world.

Conclusion:
Based on the characteristics of each animal mentioned in the given options, option 'C' (Penguin) is the correct answer. Penguins are the only flightless bird among the options and are found in cold climates, unlike the other animals.