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Option 4 : All of the above
The correct answer is option 4, i.e, All of the above
- Gulf of Riga:
- It separates Estonia and Latvia.
- It is a part of the Baltic Sea.
- It is an important wintering area for migrating birds.
- The eastern and northern coastal waters are spawning grounds for Estonia's most abundant fish species- the Baltic herring.
- It has a maximum depth of 177 feet.
- The coasts are mostly low and sandy.
- Several important rivers including the Western Dvina reach the sea there.
- English Channel:
- It separates Britain and France.
- It is a part of Atlantic Ocean.
- With an area of some 29000 square miles, it is the smallest of the shallow seas covering the continental shelf of Europe.
- From its mouth in the North Atlantic Ocean- an arbitrary limit marked by a line between the Scilly Isles and the Isle of Ushant.
- Its width gradually narrows from 112 miles to a minimum of 21 miles, while its average depth decreases from 400 to 150 feet.
- Gulf of Finland:
- It is a part of Baltic Sea.
- It separates Finland and Estonia.
- Covering an area of 11600 square miles, the gulf extends for 250 miles from east to west but only 12 to 80 miles from north to south.
- It has a maximum depth of 377 feet at its western end.
- Of low salinity, the gulf freezes over for three to five months in winter.
- It receives the Neva and Narva rivers and the Saimaa Canal.
- The gulf is an important shipping route for its main ports:
- Porkkala, Helsinki and Kotka in Finland
- Vyborg, St. Petersburg, and Kronshtadt in Russia
- Tallinn in Estonia
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