The correct answer is A. Region 1
Explanation:
Siberia is a geographical area located in the territory of Russia. This area begins in the Ural Mountains and extends to the east until it reaches the Pacific Ocean, also in the South it borders countries such as Kazakhstan, Mongolia, and China. In the map presented, areas 2, 3 and 4, are part of Siberia as these are located to the East of the Ural Mountains and are in Russian territory. However, region 1 shows the location of the Ural Mountains and covers territory in the west of these mountains. This means, part of the territory of the region 1 does not belong to the Siberia region but only to Russia, and therefore this is not part of Siberia.
