Answer: There are two different ways organisms obtain their energy source, or food. One way is with autotrophs and the other way is with heterotrophs. Autotrophs can make there own food. But on the other hand heterotrophs get their food from other organisms.
I would explain, but answer C is pretty much self-explanatory. The northern environment could not really support farming, but they had a lot of fish. The south raised crops for export like rice and sometimes tobacco.
