Final answer:
Norway is the country that is famous for its fjords, which are stunning, narrow inlets with steep sides, created by glacial erosion. Norway's fjords are a significant part of the country's landscape and tourist attractions.
Step-by-step explanation:
The countries mentioned in the reading are all located in Northern Europe and are known for their unique geographical features and cultural histories. Of the options listed - Russia, Sweden, and Norway - it is Norway that is specifically famous for its fjords. Fjords are deep, narrow, and elongated sea or lake drains with steep land on three sides. They are formed by the submergence of a glaciated valley. Norway's coastline is dotted with these fjords, which have become a symbol of the country and a significant attraction for both tourists and geographers alike. Moreover, the provided text highlights that Norway has been benefiting from the oil and natural gas reserves under the North Sea, a fact that further emphasizes Norway's close connection to its marine geography, which includes the famous fjords.