Which explains why many species of fish have been eliminated in washington?

disease has prevented migratory fish from spawning.
dams have kept migratory fish from swimming upstream.
commercial fisherman have overfished the state’s waterways.
fish farms have had little success raising fish.

Dams have kept migratory fish from swimming upstream is the fact that explains why many species of fish have been eliminated in Washington.

Option B

Explanation:

Fishes migrate to different areas if the availability of food and nutrition in one area decreases. Migration of fishes elsewhere helps areas with decreased levels of food and nutrition revive and get ready for the fishes to return and feed on them through repeated cycles.

According to reports based on researches carried out by numerous environmentalist groups, it is seen that this migration of fishes in search of food has been hindered by the dams standing between their paths of migration.

This has resulted in the elimination of many migratory species of fish either because of the death of fishes in large numbers or because of mass migration further downstream.

After doing a ressearch about the fish elimination in washington, mostly because of climate change, What ended up bringing:

- Disease. It has prevented migratory fish from spawning.

the answer to your question is,

old stone age.

-mabel < 3