Which of the following have a thick layer of fat under the skin?
Parrot , Polar bear ,Elephant ,Penguin

Options

A. A and B
B. B and C
C. A and D
D. B and D

Answer

To determine which of the animals listed have a thick layer of fat under their skin, we can analyze each option based on their adaptations to their environments.

1. **Understanding the Purpose of Fat Layer**:
- Animals living in cold environments often have a thick layer of fat under their skin. This fat serves two main purposes: it acts as insulation to retain body heat and provides cushioning to protect internal organs.

2. **Analyzing Each Animal**:
- **Parrot**: Parrots are typically found in warm climates and do not require a thick layer of fat for insulation. They have feathers instead, which help them regulate their body temperature.
- **Polar Bear**: Polar bears live in extremely cold environments (the Arctic) and have a thick layer of fat, known as blubber, under their skin. This helps them retain heat and survive in icy conditions.
- **Elephant**: Elephants are found in warmer climates and have relatively thin skin compared to polar bears. They do not have a thick layer of fat under their skin.
- **Penguin**: Penguins also live in cold environments (Antarctica) and have a thick layer of fat (blubber) under their skin, which helps them insulate against the cold.

3. **Conclusion**:
- Based on the analysis, the animals that have a thick layer of fat under their skin are the **Polar Bear** and the **Penguin**.

Thus, the correct answer is **Polar Bear and Penguin**.