"Climate is extreme, rainfall is scanty and the people used to be nomadic herders." The above statement best describes which of the following regions?

1. The statement highlights three key features: extreme climate (implying large temperature ranges, possibly continental), scanty rainfall (arid or semi-arid conditions), and traditional inhabitants being nomadic herders. 2. African Savannah (A) has distinct wet and dry seasons, but rainfall isn't typically described as 'scanty' overall compared to true arid/semi-arid regions. While pastoralism exists, the climate isn't as extreme in temperature range as continental interiors. 3. Central Asian Steppe (B) fits the description well. This region experiences a continental climate with very hot summers and very cold winters (extreme climate). Rainfall is scanty, leading to grassland/steppe vegetation. Historically and traditionally, the people of this region were nomadic herders (e.g., Mongols, Kazakhs), relying on livestock adapted to the environment. 4. North American Prairie (C) has significant temperature variations but generally receives more rainfall than 'scanty', supporting taller grasses. While indigenous groups lived there, large-scale agriculture is now dominant, and nomadic herding wasn't the defining characteristic in the same way as the steppes. 5. Siberian Tundra (D) has an extreme climate (very cold), and low precipitation ('scanty'), but the defining traditional livelihood is often associated with reindeer herding and hunting/fishing, and the vegetation is tundra (mosses, lichens, dwarf shrubs), not steppe grasslands. Central Asian Steppe better captures the combination of extreme temperature range, scanty rainfall typical of temperate grasslands, and historical nomadic herding.