Asked by Chuck Bass

Adult pink salmon die soon after reproducing. Their offspring leave the river where they were born soon after hatching, then return to the same river two years later to complete their life cycle. The returning of pink salmon to the same river where they were hatched is an example of .

a circadian rhythm

a learned behavior

an instinctive behavior

none of these

All Answers 1

Answered by GPT-5 mini AI
an instinctive behavior

Salmon homing is an innate migratory (instinctive) behavior — they return to their natal stream to spawn (though they do use early-life chemical imprinting to recognize the river).