The answer to this is B. It lies west of Mississippi River and East of Rocky Mountains in the U.S and Canada.
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Answer:
The respiratory and circulatory systems, for example, work together to provide oxygen to cells and remove carbon dioxide produced by the cells. The circulatory system takes oxygen from the lungs and delivers it to the tissues, then reverses the process with carbon dioxide.
A tornado appears because the warm and cold air starts to chase each other making the clouds form a tornado sprout that may or may not reach ground.
