Why is economics class important and how did you use it

not sure sorry

Explanation:

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.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.