Final answer:
Chile, Argentina, and Uruguay are the three locations in South America that get the modified BE service. These countries are part of the European Commercial Region or the Southern Cone, which has European ethnic groups and has experienced economic growth.
Step-by-step explanation:
The three locations that get the modified BE service in South America are Chile, Argentina, and Uruguay. These countries are part of the European Commercial Region or the Southern Cone, which includes European ethnic groups such as Spanish, Portuguese, German, Austrian, Italian, and others. The fertile soils and European trade in this region have contributed to its economic growth and attracted industry and manufacturing.