The correct option is B i-Q, ii- S, iii-P, iv-R
The coldest of all biomes, arctic tundra lies at the top edge of the Earth. The largest of all land biomes- taiga, lies below the tundra spanning almost a straight line from western Canada to eastern Russia. Earth is interspersed alternately with a region of temperate forest and grasslands from North America to the southern part of Siberia and Mongolia. Temperate forests are characterised by four distinct seasons: winter, spring, summer, and fall/autumn. Grasslands do not get enough precipitation to support trees.