South America's inland grassland areas, the llanos and the pampas, are a source of A. freshwater for irrigation.
B. shelter for small animals.
C. grazing for cattle.
D. fertile soil for crops.

The Pampas (from the Quechua: pampa, meaning "plain") are fertile South American lowlands that cover more than 1,200,000 square kilometres (460,000 sq mi) and include the Argentine provinces of Buenos Aires, La Pampa, Santa Fe, Entre Ríos, and Córdoba; all of Uruguay; and Brazil's southernmost state, Rio Grande do Sul. The vast plains are a natural region, interrupted only by the low Ventana and Tandil hills, near Bahía Blanca and Tandil (Argentina), with a height of 1,300 m (4,265 ft) and 500 m (1,640 ft), respectively.

Pampas
Natural region
Landscape in the Pampas at eye level. Brazil.
Landscape in the Pampas at eye level. Brazil.

Answer is arabian desert

Early in the story when tom finds an indian skull in the woods which he kicks in temper. the devil then makes his appearance and, as tom surveys him, he notices that the devil is neither "negro" nor "indian." in fact, he has a "swarthy" complexion and is "begrimed with soot."