The answer is a. corn. Southern colonies have fertile soil for easy to grow crops.
Rosario (Spanish pronunciation: [roˈsarjo]) is the largest city in the province of Santa Fe, in central Argentina. It is located 300 km (186 mi) northwest of Buenos Aires, on the western shore of the Paraná River.
<span>Distribution of mineral deposits would be the answer since 'economy' deals with deposits as the rest of the answers deal with weathering and they don't include an economics. </span>