The correct answer is A) Areas in central Asia had dry climates that we're not well-suited for agriculture.
Pastoral society is any society that tends large herds of animals to use as their main source of food. This type of society began in places like Central Asia mostly because areas in central Asia had dry climates that we're not well-suited for agriculture.
Pastoral societies of Central Asia were dedicated to the herding and breeding of domestic animals to produce their food. They were nomads because, in those regions, desertic and dry climates were not well-suited for agriculture. The soil did no favored agriculture techniques because it was not fertil.