What is the best definition of an undocumented worker?

Most countries have laws requiring workers to have proper documentation, often intended to prevent or minimize the employment of undocumented immigrants.Undocumented workers are foreign-born workers who lack the legal documentation required to work in the country in which they live.

B) an immigrant who lives and works in a country illegally.  

Explanation:

b) that he was not a free man

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)