Which of these island nations is located farthest east?

Barbados is located farthest east among the listed island nations. It is situated in the Caribbean Sea, to the east of the other options. Geographically, Barbados lies at a longitude of approximately 59 degrees west, making it the easternmost island in this group.

In contrast, St. Lucia, Jamaica, and Cuba are positioned more to the west. St. Lucia and Jamaica are both situated further north and west of Barbados, while Cuba is the largest of the islands listed but is also located to the northwest of Barbados. The positioning of these islands reflects their geographic coordinates, making Barbados the correct answer. Understanding the relative positions of these islands is crucial for grasping Caribbean geography and the spatial relationships within the region.