Asymbol of the resurrection used by both fra angelico and carlo crivelli was a/an
a. swallow.
b. lion.
c. open book.
d. heroic knight.

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.

the indians crossed artificial boundaries, setting the stage for conflict