Tundra is a large area on the north. Vegetation: dwarf shrubs, sedges, grasses.Taiga is a boreal forest. Vegetation: pines, spruces, larches.Forest is also not a place for wheat.Steppe is an ecoregion with large area of flat grassland. In the Russian Federation it is located from Don River to Altay mountains. There is enormous wheat belt ( also corn and cotton ). Answer: A ) Steppe.