The correct answer is option 4, Prairies. The temperate grasslands of North America, commonly referred to as prairies, are characterized by vast expanses of grasses and few to no trees. These grasslands are found in the central part of the continent, spanning from the United States into Canada. They are known for their rich soil and diverse wildlife, including large herds of grazing animals like bison. Pampas, option 1, refers to the grasslands in South America, particularly in Argentina and Uruguay. Downs, option 2, typically refers to the treeless rolling hills found in some regions of England and Australia. Steppes, option 3, are dry grasslands found in Eurasia, particularly in Russia and Kazakhstan. Therefore, the correct answer for the temperate grasslands of North America is option 4, Prairies.