The reason the united states and it’s allies engaged in daily airlifts to deliver supplies and food by air to west berlin in 1948 and 1949

East Berlin was occupied by the ussr during that time making it very difficult to get sufficient resources to West Berlin so to compromise the allies flew supplies into West Berlin for a period of time.

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)

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;