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← Nature & AnimalsConsider salmon navigating to natal streams; which mechanism determines stream identity?
A)Olfactory imprinting guides stream selection✓
B)Celestial navigation informs return routes
C)Magnetic mapping defines position
D)Ocean current monitoring triggers reversal
💡 Explanation
Olfactory imprinting occurs because juvenile salmon learn the unique chemical composition of their natal stream; therefore, adult salmon identify and return to that specific water source rather than choosing other streams because the unique 'smell' triggers homing.
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