Answer:
Option D Greek City States
Example: Athens
Generally speaking, human dwellings in early Mesopotamia were made of "<span>bricks and wood", although it should be noted that sometimes these bricks were made from mud.</span>
Production of more food--the system allowed for more food to be produced which fed the workers in an industrial economy.
The 'four-field system' rotates crops between the 4 fields no longer needing to keep one empty because one of the crops would replenish the field with nutrients while the others take nutrients away from the fields. <span />
C or d hope this helps I would reckon d<3
