What was lost and what remained after the Roman Empire fell ​

the event that was most responsible for ending the great depression is world war 2.

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.

hello most volcanoes are located at either divergent or convergent plate

this is where the plate motions aswell form magma