Final Answer:
The country that has the Mona Reservoir is Jamaica.
Step-by-step explanation:
The Mona Reservoir is located in Jamaica, a Caribbean island nation known for its lush landscapes, vibrant culture, and reggae music. This reservoir plays a crucial role in Jamaica's water supply, providing a source for irrigation and domestic use. Situated in the parish of St. Andrew, the Mona Reservoir is surrounded by picturesque scenery and is an important reservoir for water management in the region. Jamaica, with its diverse geography and natural attractions, continues to be a popular destination for tourists seeking a blend of tropical beauty and cultural richness.