Final answer:
The zoogeographical region that includes South America is highlighted by unique biodiversity due to its geological and evolutionary past, with the Southern Cone being a notable subregion influenced by European settlement and economic activities.
Step-by-step explanation:
The zoogeographical region that includes South America is known for its unique and diverse ecosystem. This region has been shaped by both the evolutionary history of the organisms found there and the movement of tectonic plates over geological time. An interesting aspect observed is the presence of the plant family Proteaceae which is found in Australia, southern Africa, and South America, indicating a shared lineage before the break up of the southern supercontinent Gondwana. Furthermore, the southern part of the continent, specifically the European Commercial Region or the Southern Cone, comprises countries like Chile, Argentina, Uruguay, and parts of Brazil. This region has seen a diverse mix of European ethnic groups settling in, contributing to its economic growth and cultural diversity, coupled with fertile soils and early European trade influences.