ответ: Largest country in the world (10.995% of the world's land mass); its European portion is roughly 4,000,000 km2, which is around 40% of the total landmass of Europe, making Russia the largest country in Europe; and its Asian portion, which covers all of Northern Asia, is around 13,100,000 km2, making Russia the largest country in Asia.
Объяснение: The water part of the earth occurs 75% of the total earth's area. Rest part is the land area. So, the marine ecosystem occurs the largest ecosystem in our planet as it is also the largest part of our planet.
