Final answer:
Hog Island, found on the Essequibo River, is part of Guyana and contributes to the region's ecological diversity.
Step-by-step explanation:
Hog Island, located on the Essequibo River, is part of Guyana. This river is one of the major rivers in South America, and Hog Island is among the many islands in its delta. The island is known for its lush vegetation and rural character, contributing to the unique biodiversity and ecological importance of the region.