Recall what weapons were used in the battle of gettysburg

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; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;