Англичане, подскажите пожалуйста))

Первое А
Второе А
Третье С
Четвёртое Д

Because so 1) little water moves through the desert soil to carry nutrients away, desert soils are naturally fertile. Crops are grown on desert lands with water provided 2) for irrigation from rivers or wells. Such transformations of desert are not without problems. Evaporation of the irrigation water results in the accumulation of salt on the surface 3) soil, eventually rendering it useless for further crop 4) production.