Final answer:
The Wollaston Islands, including Cape Horn, are part of Chile and are not divided with Argentina. The Falkland Islands, east of Argentina, are the subject of a territorial dispute between Argentina and the UK. The student may be confusing the Wollaston Islands with the Falkland Islands in their question.
Step-by-step explanation:
The query regards geographical location and territorial sovereignty associated with Cape Horn and the Wollaston Islands. Cape Horn is the southernmost point of the Tierra del Fuego archipelago, and it is located on Hornos Island, which is part of the Wollaston group of islands at the southern tip of South America. These islands are situated in Chilean territory. However, the inquiry might include a confusion as there is no eastern half of these islands belonging to Argentina. Argentina and Chile both have territories in the southern region, with Argentina being the second-largest country in South America, having a mainland southern tip and an island portion called Tierra del Fuego, which is divided between the two countries. The Wollaston Islands, including Cape Horn, are entirely within Chilean jurisdiction.
The mention of Argentina's claim pertains to the Falkland Islands (Islas Malvinas), which have been the subject of longstanding disputes between Argentina and the United Kingdom. The Falkland Islands are located in the South Atlantic Ocean, to the east of Argentina's mainland. In 1982, Argentina attempted to reclaim the Falklands, leading to the Falklands War with the UK, which ended with the islands remaining under British control.