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The graph above displays the population of trout in a slow moving river over time.
What is the BEST explanation of why trout is decreasing?
Hot factory effluent is entering the water.
Herbicide runoff is entering the water.
An invasive herbivore species was dumped into the water.
Due to climate changes, there is an increase in producers in the water.
Trees were planted along the river banks, creating more shade.