The answer is Cuba.
Madagascar, Thailand, Greenland, and Tasmania are all islands. Cuba is a country in the Caribbean Sea.
Madagascar is an island country off the southeast coast of Africa. It is the world’s fourth-largest island, after Greenland, New Guinea, and Borneo. Madagascar is home to a wide variety of plant and animal life, including many species that are found nowhere else on Earth.
Thailand is a country in Southeast Asia. It is bordered by Myanmar (Burma) to the north, Laos to the northeast, Cambodia to the east, and Malaysia to the south. Thailand is a constitutional monarchy with a population of over 69 million people. The capital city is Bangkok.
Greenland is an autonomous territory within the Kingdom of Denmark. It is located between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago. Greenland is the world’s largest island, but it is sparsely populated, with a population of just over 56,000 people. The capital city is Nuuk.
Tasmania is an island state of Australia. It is located 240 kilometres (150 mi) to the south of the Australian mainland, separated by Bass Strait. Tasmania is the world’s 26th-largest island, and the largest island state of Australia. The capital city is Hobart.