Final answer:
Trinidad and Tobago is the country home to the Caroni Swamp, Oropuche Lagoon, and Nariva Swamp, all of which are significant for biodiversity and conservation.
Step-by-step explanation:
The country that has the Caroni Swamp, the Oropuche Lagoon, and the Nariva Swamp is Trinidad and Tobago. Located off the northern edge of South America, it hosts these significant wetlands which are crucial for its biodiversity and are of vital ecological importance. The Caroni Swamp is a lush mangrove forest and a sanctuary for numerous bird species, including the national bird, the Scarlet Ibis. The Oropuche Lagoon is another important wetland area known for its rich biodiversity. The Nariva Swamp, being the largest freshwater swamp in the country, is home to a variety of wildlife and plant species, making it a significant site for conservation efforts.