The collapse of the annual salmon runs was caused in part by
A)cooler ocean temperatures.
B)removal of dams and reservoirs needed for spawning.
C)accumulated pollutants.
D)all of the above

Name: The collapse of the annual salmon runs was caused in part by A)cooler ocean temperatures. B)removal of dams and reservoirs needed for spawning. C)accumulated pollutants. D)all of the above
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Accumulated pollutants can harm salmon habitats and affect their health, contributing to the collapse of salmon runs.

The Collapse of the Annual Salmon Runs Was Caused in Part