The presence of feathers is characteristic of which class?

Answer

To determine the class of animals characterized by the presence of feathers, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Feature**: The question specifically asks about the presence of feathers. This is a distinct feature that can help us categorize animals.

2. **Recall Animal Classes**: In the animal kingdom, vertebrates are divided into different classes, including Mammals, Reptiles, Amphibians, Fish, and Birds.

3. **Analyze the Feature**: Among these classes, we need to identify which class is known for having feathers.

4. **Classify the Animals**: The class that is characterized by feathers is known as Aves. This class includes all birds.

5. **Additional Characteristics**: Birds (class Aves) not only have feathers but also possess other features such as beaks and wings. Their forelimbs are modified into wings, which are essential for flight.

6. **Conclusion**: Therefore, the presence of feathers is a characteristic of the class Aves.

### Final Answer:
The presence of feathers is characteristic of the class Aves.

---