Ah yes - chose sides time!
The seven Seas regions --- Arctic Ocean, the Atlantic Ocean, the Indian Ocean, the Pacific Ocean, the Mediterranean Sea, the Caribbean Sea, and the Gulf of Mexico.
The seven continents regions --- Asia, Africa, North America, South America, Antarctica, Europe, Oceania... plus Indian subcontinent, Arabian Peninsula, Greenland, Zealandia, Madagascar.
Or... 192 member states of the United Nations (166 if you count the EU as one)
Or... to discard political conventions all together and try something new, ask which of the twenty largest bodies of water is nearest?
Pacific Ocean, Atlantic Ocean, Indian Ocean, Arctic Ocean, South China Sea, Caribbean Sea, Mediterranean Sea, Bering Sea, Gulf of Mexico, Sea of Okhotsk, Sea of Japan, Hudson Bay, East China Sea, Andaman Sea, Red Sea, North Sea, Baltic Sea, Yellow Sea, Persian Gulf, Gulf of California...
Good Luck Woofer !