How many chambered heart is present in the aves?

Explanation

**Step-by-Step Solution:**

1. **Identify the Class**: The question asks about the heart structure in Aves, which is the class that includes all birds.

2. **Understand the Phylum**: Aves belongs to the phylum Chordata, which includes all animals with a notochord at some stage of their development.

3. **Recognize the Characteristics of Aves**: Birds (Aves) are characterized by features such as feathers, beaks, and a high metabolic rate, which require an efficient circulatory system.

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