Which animal is included in Aves?

Options

A. Kangaroo
B. Hedgehog
C. Penguin
D. Bat

Answer

### Step-by-Step Solution:

1. **Understanding the Classification**: The question asks about animals included in the class Aves. Aves is the class that encompasses all birds.

2. **Identifying the Options**: The options given are:
- Option 1: Kangaroo
- Option 2: Hedgehog
- Option 3: Penguin
- Option 4: Bat

3. **Analyzing Each Option**:
- **Kangaroo**: This is a marsupial mammal, specifically known as Macropus. Since it is a mammal, it does not belong to Aves.
- **Hedgehog**: This is a spiny mammal. It also does not belong to Aves as it is classified under mammals.
- **Penguin**: This is a bird, scientifically known as Aptenodytes. Penguins have the characteristics of birds, such as feathers and beaks, which qualifies them as members of Aves.
- **Bat**: This is a flying mammal. Bats are not birds; they belong to the class Mammalia.

4. **Conclusion**: Among the options provided, only the penguin is a member of the class Aves.

5. **Final Answer**: The animal included in Aves is the **Penguin**.