Which of the following cities went from a small midwestern town to a major metropolis between 1840 and 1900?
A. New York
B. Philadelphia
C. Chicago
D. Rochester

C is the right answer

Explanation:

In 1840, Chicago had a population of a little under 5000. By 1900, when the city had become a rail hub and contained the nation's largest stock yards, Chicago's population had surpassed 1 million.

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.