Final answer:
Dominica is a country with the Caribbean Sea to the west and the Atlantic Ocean to the east, separated from Guadeloupe by the Dominica Passage and from Martinique by the Martinique Passage.
Step-by-step explanation:
The country you are referring to is Dominica. It is located in the Eastern Caribbean and is part of the Lesser Antilles. To the west of Dominica is the Caribbean Sea, and to the east is the Atlantic Ocean.
The Dominica Passage separates it from Guadeloupe to the north, and the Martinique Passage separates it from Martinique to the south. Both Guadeloupe and Martinique are French overseas territories, whereas Dominica is an independent country.