The correct option is D
Pastoralism, in the form of transhumance or nomadism, is a current practice of life in arid and semi-arid zones, whose nature hardly favors sedentarization. The transhumant establish their domicile in a certain place and cultivate some cereal while their cattle follow each year the migratory routes that take it to the same grasslands, adapting to the regimes of rains and the growth of the pastures.