Why were western lands suitable for ranching and farming?
O Most trees had been cleared by the railroads.
O Large, expansive plains could support crops or animals.
O Both required little labor so large tracts were manageable
O Fertilizer was cheap and easy to spread

O Fertilizer was cheap and easy to spread

Explanation:

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

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.