Which organisms are classified as Aves?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Birds.
Organisms classified as Aves (birds) are warm-blooded vertebrates characterized by feathers, beaks, and the ability to lay hard-shelled eggs. They belong to the class Aves under the phylum Chordata. Examples include eagles, sparrows, penguins, and ostriches.
In contrast:
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Fishes belong to class Pisces (gills, fins, aquatic).
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Frogs are Amphibia (moist skin, live in water/land).
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Snakes are Reptilia (scales, cold-blooded).
Birds are distinct due to their feathers, lightweight bones, and flight adaptations (though some, like ostriches, are flightless).