In recent years, the largest numbers of asylees to the United States have come from all of the following countries, except

D colombia

Explanation:

i bearly took the test and came out right

done

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.