how has the Mississippi/Missouri/Ohio river system impacted settlement patterns in the United States?

im just seeing if you could make anything out of this. they probably affected them because they had to move because it was destroying their crops or it was making  it hard to live there.      

lancelot said to the beautiful ellen i c u r a b u t l n (i see you are a beauty lancelot was the greatest and worst of the knights who became the king's champion and undertook quests in the king's name. he became the adulterous lover of queen guinevere, and they had a son named galahad.