I need help finding three causes and effects for how wolfs change rivers please and thank you!

The wolves changed the behavior of the rivers. They began to meander less, there was less erosion, channels narrowed, more pools formed, more riffle sections, all of which were great for wildlife habitat.

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world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.