Explanation:

Savanna - is a rolling grassland scattered with shrubs and isolated trees, which can be found between a tropical rainforest and desert biome. Not enough rain falls on a savanna to support forests. Savannas are also known as tropical grasslands.
Pampas - are fertile South American lowlands, covering more than 750,000 km2 that include the Argentine provinces of Buenos Aires, La Pampa, Santa Fe, Entre Ríos and Córdoba; most of Uruguay; and the southernmost Brazil.
Steppes - a large area of flat unforested grassland in SE Europe or Siberia. In Asia, a subtropical steppe can be found in semi-arid lands that fringe the Thar Desert of the Indian subcontinent and the Badia of the Arabian peninsula.
Velds - open, grassland in southern Africa. Particularly, it is a flat area covered in grass or low scrub, especially in the countries of South Africa, Lesotho, Swaziland, Zimbabwe, Botswana, and Namibia.