Correct Answer: Chernozem soils

Solution : The correct option is Chernozem soils.

Chernozem soils, often referred to as "black earth" soils, are a type of soil known for their high fertility and dark color originates  under tall-grass prairie vegetation. These soils are typically found in the temperate grassland regions of the world, particularly in Eastern Europe, Russia, and parts of North America.