Final answer:
Denmark separates most of the Baltic Sea from the North Sea, highlighting its strategic geographic position in Northern Europe.
Step-by-step explanation:
The country that separates most of the Baltic Sea from the North Sea is Denmark. Denmark is situated at the northern edge of Europe and features a peninsula, Jutland, along with an archipelago of more than 400 islands. A significant structure demonstrating Denmark's key geographical position between the two seas is the impressive Øresund Bridge, which connects Denmark to Sweden and facilitates the movement of people, goods, and materials across the Baltic Sea. Denmark's location has played a crucial role in Northern Europe's efforts to integrate itself economically with both Eastern and Western Europe, with the Baltic states working towards economic integration after their independence from the Soviet Union.