Explanation:

- Option 1: Mammalia

- Mammals are characterized by having hair, mammary glands, and three middle ear bones.

- Parrots do not belong to this class.

- Option 2: Amphibia

- Amphibians typically live both in water and on land and have life stages that include aquatic larval and adult forms.

- Parrots are not amphibians.

- Option 3: Aves

- Birds, including parrots, belong to this class.

- They are known for feathers, beaks, and laying eggs.

Correct Answer: Option 3 - Aves

- Parrots are indeed birds.

- Option 4: Reptilia

- Reptiles are cold-blooded and often have scales.

- This class does not include parrots.