The introduction of horses to the Plain Indians by the Spanish resulted in: o A. Increases in farming. B. Peace agreements. c. Cultural changes. D. Growth of cities. SUB​

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

whats the video? can u send a link?

d. both had been uninhabited before settlers arrived.