What three large seas lie just south of Europe? plz need help

A peninsula is a piece of land surrounded by water on three sides. Europe is a peninsula of the Eurasian supercontinent and is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, and the Mediterranean, Black, and Caspian Seas to the south.

Explanation:

The correct answer is closed economy.

A closed economy is a system in which a country has no trade activities with outside economics.

The closed economy is self-sufficient and the customers are provided with goods produced exclusively in their own country, there is no export nor import.

Today, there are no countries with closed economies only. To be a totally closed one, the nation would heave to be self-sufficient in everything, starting with raw material and resources for producing goods and finishing with enough qualified human labor.

Some economies are semi-closed with some economic activities limited by trade barriers, quotas and tariffs.