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← Nature & AnimalsWhich risk increases for salmon migrating upstream when unusually strong geomagnetic storms occur?
A)Disrupted olfactory map construction accuracy✓
B)Increased susceptibility to parasitic infections
C)Elevated metabolic demand during travel
D)Dehydration from increased river turbulence
💡 Explanation
Geomagnetic storms disrupt the detection of the Earth's magnetic field, impairing their magnetic compass during migration, because it affects the sensing organ; navigation requires olfactory maps; therefore misdirection, disorientation risk increases via impaired senses of magnetic variation signals, rather than other metabolic effects.
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