One drawback of voluntary trade is that it

a. requires two groups to use a common language
b. can make one group dependent upon another for necessary goods
c. doesn't occur unless there is a shortage of goods for at least one group
d. forces groups to rely on themselves to produce all the goods they need

B. can make one group rely on the other. :D

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)

it may be touching on the issue of over sexualizing all women