1. Paleoanthropologists have concluded that the origins of humanity lie in the
regions of Africa.

South Africa and parts of East Africa excluding Somalia.

Explanation: This is where humans were supposedly originated from

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.

idk