Drag each label to the correct location.
Match each type of cause with the source that could shed light on that cause.

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.

answer: not really

explanation: the disadvantages of wikipedia are:

the advantages of wikipedia are

islam spread slowly through much of africa through trade and preaching.

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers