Final answer:
Iceland is the Nordic country that obtains all its electricity and heat from renewable sources, leveraging its geothermal resources and hydroelectric power.
Step-by-step explanation:
The Nordic country that is renowned for obtaining 100% of its electricity and heat from renewable sources is Iceland. Iceland's remarkable achievement is possible due to its unique geological location, which provides abundant geothermal resources. The country is situated on the so-called "ring of fire," an area with high volcanic activity, allowing it to tap into geothermal energy to meet its power needs. Additionally, Iceland also harnesses hydroelectric power to meet its energy demands. This dedication to renewable energy not only secures Iceland's energy independence but also positions it as a leader in sustainable energy use.