What bodies of water provided the eastern border of the zhou dynasty? ?

the yellow sea. You can look at a map of china and see that the yellow sea is to the east

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)