Which was an advantage for the South at the start of the Civil War? a smaller population
an industrial economy
a well-led army
O fewer miles of railroad
ate

An industrial economy

Explanation:

im not sure this is the right answer, but I know the South a.k.a The Confederates are using slaves as an advantage of their economy. This helped them to rise the economy and they were rich

i believe it d) heterogeneous

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)