Difficulty: Easy
Correct Answer: Bat
Explanation:
Introduction / Context:Taxonomic classification offers a crisp dividing line. Three options are birds (class Aves) with feathers and beaks. A bat is a mammal (class Mammalia) with fur and mammary glands.
Given Data / Assumptions:
Concept / Approach:Use class-level taxonomy. Despite superficial similarity (wings, flight), bats are not birds; they are mammals with distinct anatomy and reproduction (live young, nursing).
Step-by-Step Solution:
1) Tag parrot/crow/pigeon as birds (Aves).2) Tag bat as mammal (Mammalia).3) Bat is the only mammal → odd one out.Verification / Alternative check:Feathers vs fur: birds have feathers; mammals have hair/fur. Bats lack feathers.
Why Other Options Are Wrong:They share the core bird traits.
Common Pitfalls:Do not classify by ability to fly alone; some birds cannot fly and some mammals can (bats).
Final Answer:Bat
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