I think number 3 not sure could be wrong.
Answer:
Freshwater ecosystems have been modified through the creation of dams and through the withdrawal of water for human use. The construction of dams and other structures along rivers has moderately or strongly affected flows in 60% of the large river systems in the world.
Explanation:
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Answer:
Many Americans withdrew their support.
Explanation:
When the cost of the war effort in Iraq became much, many American withdrew their support for the war in Iraq and asked for their troops to be returned home