Use THE with the features of the environment

We don`t use any article with the names of:  Continents: Europe, Asia, North America, Australia  Countries: Russia, Spain, Sweden, New Zealand  Mountains: Everest, Elbrus  Islands: Bermuda, Iceland  Cities|Towens: Moscow, London, Paris

We use THE:  Oceans: the Atlantic ocean, the Pacific ocean  Seas: the Baltic Sea, the North Sea  Rivers: the Volga, the Ob  Channels: the English Channel  Lakes: the Ontario, the Onega

We use THE:  Republic : the Russian Federation  State : the USA  Kingdom: the United Kingdom  Federation:

We use THE:  Mountain chains: the Alps, the Urals, the Caucasus  The group of islands: The Bahamas, the British Isles