Explanation:

- Correct Answer: Option 3: Velds

- The grasslands of Southern Africa are known as velds.

- Velds are characterized by open, grassy landscapes and are primarily found in South Africa, Zimbabwe, and Botswana.

- Option 1: Savannah

- The savannah is a type of grassland with scattered trees, found mainly in Africa, near the equatorial region.

- It supports a diverse range of wildlife.

- Option 2: Pampas

- The pampas are extensive, treeless plains found in South America, particularly in Argentina and Uruguay.

- They are known for their fertile soil and are important agricultural regions.

- Option 4: Prairies

- Prairies are grasslands located primarily in North America.

- They are characterized by tall grasses and are found in the central United States and Canada.

Understanding these different grasslands helps in recognizing the unique ecological and geographical features specific to each region.