Answer:
missionaries were responsible for beginning the mass movement to oregon.
It would be the "Dawes Act," that <span>resulted from nativism and primarily affected the Western part of the U.S., since this allowed the US government to appropriate Native American land for white settlement. </span>
Canals are man-made, meaning, they are Human Systems.
Faults are natural, meaning, they are <span>Physical Systems.
Floods are not created by man, meaning, they are </span>Physical Systems.
Bridges are man-made, meaning, they are Human Systems.
I hope this helps!